The Roman Mass of the Late 15th Century now (partly) up!

It may not be much of a news, I know, but I've finished typing half of the ordo of the 15th century Roman Mass, derived from Henry Bradshaw & Son's Missale Romanum Mediolani, 1474. It's only half-complete, so stay tuned for updates.

The Mass as it was in Rome: the Roman Mass of the 15th century, part 5

Oremus. Preceptis salutaribus et divina institutione formati audemus dicere:

Pater noster qui es in celis
Sanctificetur nomen tuum
Adueniat regnum tuum
Fiat uoluntas tua sicut in celo et in terra
Panem nostrum quotidianum da nobis hodie
Et dimitte nobis debita nostra
Sicut et nos dimittimus debitoribus nostris
et ne nos inducas in tentationem.
Sed libera nos a malo Amen.

Libera nos quaesumus Domine ab omnibus malis preteritis presentibus et futuris et intercedente beata et gloriosa semper uirgine Dei genitrice Maria cum beatis apostolis tuis Petro et Paulo atque Andrea et omnibus sanctis da propitius pacem in diebus nostris ut ope misericordie tue adiuti et a peccato simus semper liberi et ab omni perturbatione securi. Hic frangit Hostiam primo in duas partes dicens: Per eumdem Dominum nostrum Iesum Xpm Filium tuum Deinde frangit unam partem in duas partes dicens: Qui tecum vivit et regnat in unitate Spiritus Sancti Deus Hic eleuet modicus tertiam partem cum calice dicens: Per omnia secula seculorum.

Amen.

Hic facit signum Crucis super sanguinem dicens: Pax + Domini sit + semper uobis+cum.
R./ Et cum spiritu tuo.

Sequitur: Agnus Dei qui tolis peccata mundi miserere nobis.
Agnus Dei qui tolis peccata mundi miserere nobis.
Agnus Dei qui tollis peccata mundi dona nobis pacem.

Hic inclinat se ante corpus Domini dicens: Domine Iesu Xpe qui dixisti Apostolis tuis pacem meam do vobis pacem relinquo uobis ne respicias peccata mea sed fidem ecclesie tue eamque secundum uoluntatem tuam pacificare et coadunare digneris qui vivis et regnas Deus per omnia secula seculorum. Amen.

Hic deosculatur Altare dicens: Pax tecum.
R./ Et cum spiritu tuo.

Domine Iesu Xpe fili Dei uiui qui ex uoluntate Patris cooperante Spiritu Sancto per mortem tuam mundum uiuificasti libera me per hoc sacrificium Corpus et Sanguinem tuum ab omnibus iniquitatibus meis et uniuersis malis et fac me tuis semper inherere mandatis et a te numquam separari permittas qui cum eodem Deo Patre et Spiritu Sancto uiuis et regnas Deus in secula seculorum. Amen.

Perceptio corporis tui Domine Iesu Xpe quod ego indinus sumere presumo non mihi proueniat in iudicium et condemnationem sed pro tua pietate prosit michi ad tutamentum mentis et corporis et ad medelam percipiendam qui uiuis et regnas cum Deo Patre etcetera.

Hic accipitur patena cum corpore Xpi: Panem celestem accipiam et nomen Domini inuocabo.
Hic percutiat ter pectus dicens: Domine non sum dignus et intres sub tectum meum sed tantum dic uerbo et sanabitur anima mea.
Hic sumat corpus reuerenter signans se illo dicens: Corpus Domini nostri Iesu Xpi custodiat animam meam in uitam eternam. Amen.

Hic accipiat calicem et dicat: Quid retribuam Domino pro omnibus quae retribuit michi. Calicem salutaris accipiam et nomen Domini inuocabo. Laudans inuocabo Dominum et ab inimicis meis saluus ero.
Hic sumat sanguinem dicens: Sanguis Domini nostri Iesu Xpi custodiat animam meam in uitam eternam. Amen.
Post sumptionem sanguinis dicat: Quod ore sumpsimus Domine pura mente capiamus et de munere temporali fiat nobis remedium sempiternum Amen.

Hic dicit purificando: Corpus tuum Domine quod sumpsi et Sanguis quem potaui adhereat uisceribus meis et presta ut in me non remaneat scelerum macula quem pura et sancta refererunt sacramenta Qui uiuis.

Finita missa et data benedictione inclinat se ante medium altaris et dicit hanc orationem qua finita osculatur altare: Placeat tibi sancta Trinitas obsequium seruitutis mee et presta ut sacrificium quod oculis tue maiestatis indignus obtuli tibi sit acceptabile michique et omnibus proquibus illud obtuli sit te miserante propitiabile. Per Xpm Dominum nostrum Amen.
=====================

Let us pray. Taught by our Savior's command and formed by the word of God, we dare to say:

Our Father, who art in Heaven,
Holy be Thy Name;
Thy Kingdom come;
Thy will be done on Earth as it is in Heaven.
Give us this day our daily bread;
And forgive us our trespasses
As we forgive those who trespass against us;
And lead us not into temptation.
But deliver us from evil. Amen.

Deliver us, O Lord, we beg You, from all evils, past, present, and to come; and by the intercession of the blessed and glorious ever-Virgin, Mother of God, Mary, together with Your Blessed Apostles Peter and Paul, and Andrew, and all the Saints; mercifully grant peace in our days, that through the bounteous help of Your mercy, we may be always free from sin and safe from all disturbance. Here he breaks the Host first into two pieces, saying: Through the same Jesus Christ, Your Son, Then he breaks the first half into two pieces, saying: who lives and reigns with You, in the unity of the Holy Spirit; God, Here he moderately elevates the third part with the Chalice, saying: forever and ever.

Amen.

Here he makes the sign of the Cross over the Blood, saying: The peace + of the Lord be + always + with you.
R./ And with your spirit.

Then follows: Lamb of God, who takes away the sins of the world, have mercy on us.
Lamb of God, who takes away the sins of the world, have mercy on us.
Lamb of God, who takes away the sins of the world, grant us peace.

Here he shall bow before the body of the Lord, saying: Lord Jesus Christ, who said to Your Apostles: My peace I give to you, Peace I leave you; look not upon my sins, but upon the faith of Your Church; and deign to give her that peace and unity which is agreeable to Your will: God, who lives and reigns, forever and ever. Amen.

Here he kisses the Altar, saying: Peace be with you.
R./ And with your spirit.

Lord Jesus Christ, Son of the living God; who, by the will of the Father and the cooperation of the Holy Spirit, has by Your death given life to the world; deliver me by this, Your most sacred Body and Blood, from all my iniquities and from every evil; make me cling always to Your commandments, and permit me never to be separated from You. Who with the same God the Father and the Holy Spirit lives and reigns; God, frever and ever. Amen.

Let not the partaking of Your Body, O Lord Jesus Christ, which I, though unworthy, presume to receive, turn to my judgment and condemnation; but through Your mercy may it be to me a safeguard and a healing remedy both of soul and body. Who lives and reigns with God the Father etc.

Here he shall take the paten with the body of Christ: I will take the Bread of Heaven, and will call upon the name of the Lord.
Here he strikes his breast, saying: Lord, I am not worthy that You should enter under my roof; but only say the word, and my soul shall be healed.
Here he shall consume the Host reverently and sign himself, saying: May the Body of Our Lord Jesus Christ preserve my soul to everlasting life. Amen.

Here he shall take the Chalice and say: What return will I make to the Lord for all the things that He has given to me? I will take the chalice of salvation, and call upon the Name of the Lord. I will call upon the Lord and give praise, and I will be saved from my enemies.
Here he shall consume the Blood, saying: May the Blood of Our Lord Jesus Christ preserve my soul to everlasting life. Amen.
After consuming the Blood, he shall say: Grant, O Lord, that what we have taken with our mouth, we may receive with a pure mind; and that from a temporal gift it may become for us an everlasting remedy. Amen.

Here, while purifying, he shall say: May Your Body, O Lord, which I have received and Your Blood which I have drunk, cleave to my bowels, and grant that no stain of sin remain in me; whom these pure and holy Sacraments have refreshed; who lives, etc.

When the Mass is finished and the benediction given, he shall bow before the middle of the Altar and say this prayer; afterwards he shall kiss the Altar: May the tribute of my homage be pleasing to You, O most holy Trinity. Grant that the Sacrifice which I, unworthy as I am, have offered in the presence of Your Majesty, may be acceptable to You. Through Your mercy may it bring forgiveness to me and to all for whom I have offered it; through Christ our Lord. Amen.

The Mass as it was in Rome: the Roman Mass of the 15th century, part 4

NOTE: The following article contains the text of the Canon of the Mass from the Missale Romanum Mediolani. I would not be providing an English translation of it here, as it is exactly similar to the one used in the Post-1570 Roman Mass anyway, but would kindly refer the reader to this link which has the Canon (post-1570 version) in both Latin and English, which could also be helpful for comparison between the rubrics.

Te igitur, clementissime Pater per Iesum Xpm Filium tuum Dominum nostrum supplices rogamus ac petimus uti accepta habeas et benedicas hec + dona hec + munera hec + sancta sacrificia illibata in primis que tibi offerimus pro Ecclesia tua sancta catholica quam pacificare custodire adunare et regere digneris toto orbe terrarum una cum famulo tuo Papa nostro N. et Antistite nostro N. et omnibus orthodoxis atque catholice et apostolice fidei cultoribus.

Memento Domine famulorum famularumque tuarum N. et omnium circumstantium quorum tibi fides cognita est, et nota deuotio: pro quibus tibi offérimus uel qui tibi offerunt hoc sacrificium laudis pro se suisque omnibus pro redemptione animarum suarum, pro spe salutis et incolumitatis sue tibique reddunt uota sua eterno Deo, uiuo et uero.

Communicantes et memoriam uenerantes in primis gloriose semper uirginis Marie, genitrícis Dei et Domini nostri Iesu Christi sed et beatorum apostolorum ac martyrum tuorum Petri et Pauli Andree Iacobi Ioannis Thome Iacobi Philippi Bartholomei Matthei Simonis et Thaddei Cleti Clementis Xysti Cornelii Cyprini Laurentii Crisogoni Ioannis et Pauli Cosme et Damiani et omnium sanctorum tuorum quorum meritis precibusque concedas ut in omnibus protectionis tue muniamur auxilio. Per eumdem Xpm Dominum nostrum. Amen.

Hanc igitur oblationem seruitutis nostre sed et cuncte famílie tue quesumus Domine ut placatus accípias diesque nostros in tua pace disponas atque ab eterna damnatione nos eripi et in electorum tuorum iubeas grege numerari. Per Xpm Dominum nostrum. Amen.

Quam oblationem tu Deus in omnibus quesumus bene+dictam adscrip+tam, ra+tam rationabilem acceptabilemque facere digneris ut nobis Cor+pus et San+guis fiat dilectissimi Fílii tui Domini nostri Iesu Xpi.

Hic accipiat hostiam in manibus dicendo¹: Qui pridie quam pateretur accepit panem in sanctas ac uenerabiles manus suas et elevatis oculis in celum ad te Deum Patrem suum omnipotentem tibi gratias agens bene+dixit fregit deditque discipulis suis dicens: Accipite et manducate ex hoc omnes.

Hoc est enim Corpus meum.

Hic deponat hostiam et leuet calicem dicens²: Simili modo postquam cenatum est accipiens et hunc preclarum calicem in sanctas ac uenerabiles manus suas item tibi gratias agens bene+dixit deditque discipulis suis dicens: Accipite et bibite ex eo omnes.Hic est enim Calix Sanguinis mei
noui et eterni testamenti
mysterium fidei
qui pro uobis et pro multis effundetur
in remissionem peccatorum.

Hec quotiescumque feceritis, in mei memoriam facietis.

Vnde et momores Domine nos serui tui sed et plebs tua sancta eiusdem Xpi Filii tui Domini nostri tam beate Passionis nec non et ab inferis Resurrectionis sed et in coelos gloriose Ascensionis offerimus preclare maiestati tuae de tuis donis ac datis hostiam + puram hostiam + sanctam, hostiam + immaculatam panem + sanctum vite eterne et calicem + salutis perpetue.

Supra que propitio ac sereno uultu respicere digneris et accepta habere sicuti accepta habere dignatus es munera pueri tui iusti Abel et sacrificium patriarce nostri Abrahe et quod tibi obtulit summus sacerdos tuus Melchisedech sanctum sacrificium immaculatam hostiam. Hic inclinet se dicat³.

Supplices te rogamus omnipotens Deus iube hec perferri per manus sancti Angeli tui in sublime altare tuum in conspectu diuine maiestatis tue ut quoquot ex hac altaris participatione sacrocanctum Filii tui Cor+pus et San+guinem sumpserimus omni benedictione celesti et gratia repleamur. Per eumdem Xpm Dominum nostrum. Amen.

Memento etiam Domine famulorum famularumque tuarum N. et N. qui nos precesserunt cum signo fidei et dormiunt in somno pacis. Ipsis Domine et omnibus in Christo quiescentibus locum refrigerii lucis et pacis ut indulgeas deprecamur. Per eumdem Xpm Dominum nostrum. Amen.

Hic percutiat pectus suum aliquantum altius dicens⁴: Nobis quoque peccatoribus famulis tuis de multitudine miserationum tuarum sperantibus partem aliquam et societatem donare digneris cum tuis sanctis Apostolis et martiribus cum Ioanne Stephano Matthia Barnaba Ignatio Alexandro Marcellino Petro Felicitate Perpetua Agata Lucia Agnete Cecilia Anastasia et omnibus Sanctis tuis intra quorum nos consortium non estimator meritim sed uenie quesumus largitor admitte. Per Xpm Dominum nostrum. Hic non dicitur Amen⁵:

Per quem hec omnia Domine semper bona creas sancti+ficas vivi+ficas bene+dicis et prestas nobis. Per ip+sum et cum ip+so et in ip+so est tibi Deo Patri + omnipotenti in unitate Spiritus + Sancti omnis honor et gloria.

Per omnia secula seculorum.
R./ Amen.

FOOTNOTES (Translations of the rubrics)

1.) Here he shall take the Host in his hands and say:
2.) Here he shall put down the Host and raise the Chalice, saying:
3.) He shall bow and say:
4.) Here he shall beat his breast deeply to some extent, saying:
5.) Here Amen is not said.

The Mass as it was in Rome: the Roman Mass of the 15th century, part 3

NOTE: The following are the various Prefaces (and special forms of the Communicantes and the Hanc Igitur) for various feasts and seasons. I will not provide an English translation of them here, but please kindly check the links below to various Masses which contain the English versions of these Propers.

1.)THE PREFACE OF THE NATIVITY: The following Preface is sung everyday starting from the vigil of the Nativity of the Lord up to the Epiphany and in the Purification of the Virgin, and the Mass of the Body of Christ (i.e. Corpus Christi).

Sequens Prephatio cum suo cantu dicitur quotidie a vigilia nativitatis Domini usque ad Epyphaniam et in purificatione Virginis Marie et in Missa de corpore Christi: Eterne Deus quia per incarnati Uerbi mysterium noua mentis nostre oculis lux tue claritatis infulsit ut dum uisibiliter Deum cognoscimus per hunc in inuisibilium amorem rapiamur. Et ideo cum Angelis et Archangelis cum Tronis et Dominationibus cumque omni militia celestis exercitus hymnum glorie tue canimus sine fine dicentes:

Sanctus Sanctus Sanctus Dominus Deus Sabaoth. Pleni sunt celi et terra gloria tua. Osanna in excelsis. Benedictus qui venit in nomine Domini. Osanna in excelsis.

Communicantes et noctem uel diem sacratissimum celebrantes qua uel quo beate Marie intemerata virginitas huic mundo edidit Saluatorem sed et memoriam venerantes in primis eiusdem gloriose semper uirginis Marie Genitricis eiusdem Dei et Domini nostri Iesu Christi sed et beatorum Apostolorum et cetera.

2.) THE PREFACE OF THE EPIPHANY: The follwing Preface is sung at the Epiphany of the Lord and during the whole octave:

Sequens Prephatio cum suo cantu dicitur in Epyphania Domini et per totam octavam: Eterne Deus quia cum Unigenitus tuus in substantia nostre mortalitatis apparuit noua nos immortalitatis sua lucem reparauit. Et ideo.

Communicantes et diem sacratissimum celebrantes quo Unigenitus tuus in tua tecum gloria coeternus in ueritate carnis nostre uisibiliter corporalis apparuit sed et memoriam uenerantes in primis gloriose semper uirginis Marie genetricis eiusdem Dei et Domini nostri Iesu Xpi sed et beatorum Apostolorum et cetera.

3.) THE PREFACE FOR LENT: The following Preface is sung everyday starting from Ash Wednesday up to Palm Sunday, unless the Mass occurs during a Feast:

Sequens Prephatio cum suo cantu dicitur quotidie a Die Cineris usque ad Dominicam in ramis Palmarum. Nisi in Missa de festo si occurrerit: .Eterne Deus qui corporali ieiunio uitia comprimis mentem eleuas uirtutem largiris et premia per Xpm Dominum nostrum per quem maiestatem.

4.) THE PREFACE FOR EASTER: The following Preface is sung everyday starting from the Paschal Vigil up to the (Easter) Octave, in solemn feasts, and in all Sundays that had not been assigned with another Preface up to the feast of the Ascension:

Sequens Prephatio cum suo cantu dicitur quotidie a vigilie Pasche usque ad octavam et in solemnibus festis et per omnes Dominicas usque ad Ascencionem ubi non assignatur alia Prephatio: Aequum et salutare, te quidem Domine omni tempore sed in hoc potissimum die gloriosis predicare cum Pascha nostrum immolatus est Cristus. Ipse enim verus est Agnus qui abstulit peccata mundi. Qui mortem nostram moriendo destruxit et uitam resurgendo reparavit. Et ideo cum Angelis.

Infra Ac.: Communicantes, et diem sacratissimum celebrantes Resurrectionis Domini nostri Iesu Xpi secundum carnem sed et memoriam uenerantes in primis gloriose semper Uirginis Marie genetricis eiusdem Dei et Domini nostri Iesu Christi sed et beatorum Apostolorum et cetera.

Hanc igitur oblationem servitutis nostre set et cuncte familie tue quam tibi offerimus pro his quoque quos regenerare dignatus es ex aqua et Spiritu Sancto tribuens eis remissionem omnium peccatorum quesumus Domine ut placatus accipias diesque nostros et cetera.

5.) THE PREFACE OF THE ASCENSION: The following Preface is sung in Ascension day and all the way up to the vigil of Pentecost:

Sequens Prephatio cum suo cantu dicitur in die Ascensionis et deinceps usque ad vigiliam Pentecostes: Per Xpm Dominum nostrum. Qui post resurrectionem suam omnibus discipulis suis manifestus apparuit et ipsis cernentibus est elevatus in celum ut nos divinitatis sue tribueret esse participes. Et ideo.

Communicantes et diem sacratissimum celebrantes quo Dominus noster unigenitus Filius tuus unitam sibi fragilitatis nostre substantiam in glorie tue dextera collocauit sed et memoriam uenerantes in primis gloriose semperque Uirginis Marie genetricis eiusdem Dei et Domini nostri Iesu Xpi sed et beatorum Apostolorum, et cetera.

6.) THE PREFACE FOR PENTECOST: The following Preface is sung from the vigil of Pentecost up to its octave:

Sequens Prephatio cum suo cantu dicitur a vigilia Pentecostes usque ad octavam: Per Xpm Dominum nostrum. Qui ascendens super omnes celos sedensque ad dexteram tuam promissum Spiritum Sanctum hodierna die in filios adoptionis effudit. Quapropter profusis gaudiis totus in orbe terrarum mundus exsultat. Sed et superne Uirtutes atque angelice Potestates hymnum glorie tue concinunt sine fine dicentes: Sanctus.

Communicantes et diem sacratissimum Pentecosten celebrantes quo Spiritus Sanctus Apostolis innumeris linguis apparuit sed et memoriam venerantes et cetera.

Hanc igitur oblationem seruitutis nostre set et cuncte familie tue quam tibi offerimus pro his quoque quos regenerare dignatus es ex aqua et Spiritu Sancto tribuens eis remissionem omnium peccatorum quesumus Domine ut placatus accipias et cetera.

7.) THE PREFACE OF THE APOSTLES: The following Preface is sung in all feasts of the Apostles and Evangelists and the octaves thereof, save on other Feasts within the octave:

Sequens Prephatio cum suo cantu dicitur in omnibus festis Apostolorum et Euangelistarum, et per octauas eorum et si de alio festo infra illas octauas agatur et hoc ubi alia non assignatur: Equum et salutare te Domine suppliciter exorare ut gregem tuum pastor eterne non deseras: sed per beatos Apostolos tuos continua protectione custodias. Ut hisdem rectoribus gubernetur quos operis tui vicarios eidem contulisti preesse pastores. Et ideo.

8.) THE PREFACE OF THE BLESSED VIRGIN: The following Preface is sung in all Solemnities of the Blessed Virgin Mary, and in the octaves thereof; save the feast of the Purification, on other Feasts within the octave, and at major Saturdays when the Mass of the Blessed Virgin is celebrated:

Sequens Prephatio cum suo cantu dicitur in omnibus solemnitatibus Beate Marie Uirginis, et infra octauas earum, excepto festo Purificationis etiam si de alio festo infra octavas agtur et similitur quando in diebus Sabbati maior Missa de Beata Uirgine celebratur: Eterne Deus. Et te in Assumptione (Annuntiatione, Nativitate, Visitatione, Veneratione) beate Marie semper uirginis collaudare benedicere et predicare. Que et unigenitum tuum Sancti Spiritus obumbratione concepit et uirginitatis gloria permanente lumen eternum mundo effudit Iesum Xpm Dominum nostrum. Per quem.

9.) THE PREFACE OF THE HOLY CROSS: The following Preface is sung in the solemnities of the Holy Cross:

Sequens Prephatio cum suo cantu dicitur in solemnitatibus Sancte Crucis: Eterne Deus. Qui salutem humani generis in ligno crucis constituisti ut unde mors oriebatur inde uita resurgeret et qui in ligno uincebat in ligno quoque vinceretur per Xpm Dominum nostrum. Per quem.

10.) THE PREFACE OF THE HOLY TRINITY:

Prephatio in Sancta Trinitate: Eterne Deus. Qui cum unigenito Filio tuo et Spiritu Sancto unus es Deus unus es Dominus non in unius singularitate persone sed in unius Trinitate substantie. Quod enim de tua gloria reuelante te credimus hoc de Filio tuo hoc de Spiritu Sancto sine differentia discretionis sentimus. Vt in confessione uere sempiterneque Deitatis et in personis proprietas et in essentia unitas et in maiestate adoretur equalitas. Quam laudant Angeli atque Archangeli Cherubin quoque ac Seraphin qui non cessant clamare quottidie una voce dicentes: Sanctus.

11.) THE COMMON PREFACE: The following Preface is sung in Double Feasts and the octaves thereof; save on other Feasts within the octave, and on all Semidouble Feasts and on Sundays without an assigned Proper:

Sequens Prephatio cum suo cantu dicitur in festis duplicibus et per octauas eorum etiam si de alio festo infra illas agitur. Et in omnibus semiduplicibus et Dominicis nisi proprium assignetur:

V./ Per omnia secula seculorum.
R./ Dominus uobiscum.
V./ Et cum spiritu tuo.
R./ Sursum corda.
V./ Habemus ad Dominum.
R./ Gratias agamus Domino Deo nostro.
V./ Dignum et iustum est.

Vere dignum et iustum est equum et salutare nos tibi semper et ubique gratias agere Domine sancte Pater omnipotens eterne Deus per Xpm Dominum nostrum. Per quem maiestatem tuam laudant Angel adorant Dominationes tremunt Potestates celi celorumque virtutes ac beata Seraphim socia exsultatione concelebrant. Cum quibus et nostras voces ut admitti iubeas deprecamur supplici confessione dicentes: Sanctus.

12.) THE COMMON PREFACE: The following Preface is sung in Simple Feasts and in ferial days without an assigned Proper:

Sequens Prephatio cum suo cantu dicitur in festis simplicibus et in diebus ferialibus nisi propria assignetur:

V./ Per omnia secula seculorum.
R./ Dominus uobiscum.
V./ Et cum spiritu tuo.
R./ Sursum corda.
V./ Habemus ad Dominum.
R./ Gratias agamus Domino Deo nostro.
V./ Dignum et iustum est.

Vere dignum et iustum est equum et salutare nos tibi semper et ubique gratias agere Domine sancte Pater omnipotens eterne Deus per Xpm Dominum nostrum. Per quem maiestatem tuam laudant Angel adorant Dominationes tremunt Potestates celi celorumque virtutes ac beata Seraphim socia exsultatione concelebrant. Cum quibus et nostras voces ut admitti iubeas deprecamur supplici confessione dicentes: Sanctus.

The Mass as it was in Rome: the Roman Mass of the 15th century, part 2

Completo Euangelio dicit Sacerdos: Credo in unum Deum. Patrem omnipotentem factorem celi et terre, uisibilium omnium, et inuisibilium. Et in unum Dominum Iesum Xpm Filium Dei unigenitum. Et ex Patre natum ante omnia secula. Deum de Deo Lumen de lumine Deum uerum de Deo uero. Genitum, non factum, consubstantialem Patri per quem omnia facta sunt. Qui propter nos homines et propter nostram salutem descendit de celis. Et incarnatus est de Spiritu Sancto ex Maria uirgine et homo factus est. Crucifixus etiam pro nobis sub Pontio Pilato passus et sepultus est. Et resurrexit tertia die secundum Scripturas. Et ascendit in celum sedet ad dexteram Patris. Et iterum uenturus est cum gloria iudicare uiuos et mortuos cuius regni non erit finis. Et in Spiritum Sanctum Dominum, et uiuificantem qui ex Patre Filioque procedit. Qui cum Patre et Filio simul adoratur et conglorificatur qui locutus est per Prophetas. Et unam sanctam catholicam et apostolicam Ecclesiam. Confiteor unum baptisma in remissionem peccatorum. Et expecto resurrectionem mortuorum. Et uitam uenturi seculi. Amen.

Quando Sacerdos offert hanc Hostiam super altare dicat hanc orationem: Suscipe sancte Pater omnipotens et eterne Deus hanc immaculatem Hostiam quam ego indignus famulus tuus offero tibi Deo meo uivo et uero pro innumerabilis peccatis et offensionibus et negligentiis meis et pro omnibus fidelibus Xpianis uiuis atque defunctis: ut michi et illis proficiat ad salutem in vitam eternam. Amen.

Quando mittit aquam in calicem dicit orationem: Deus qui humane substantie dignitatem mirabiliter condidisti, et mirabilius reformasti da nobis per huius aque et uini mysterium eius diuinitatis esse consortes qui humanitatis nostre fieri dignatus est particeps Iesus Xpus filius tuus Dominus noster qui tecum uiuit et regnat in unitate cum Spiritus Sancti Deus, per omnia secula seculorum. Amen.

Deinde dicit: In spiritu humilitatis et in animo contrito sucipiamur a te Domine et sic fiat sacrificium nostrum in conspectu tuo hodie ut placeat tibi Domine Deus.

Sequitur oratio super hostiam et calicem cum signo Crucis: Veni Sanctifìcator omnipotens eterne Deus: et bene+dic hoc sacrificium tuo sancto nomini preparatum.

Cum incensum oblata dicit: Per intercessionem beati Michaelis Archangeli stantis a dextris altaris incensi et omnium electorum suorum incensum istud dignetur Dominus bene+dicere et in odorem suauitatis accipere. Per Xpm Dominum nostrum. Amen.

Cum incensat oblata dicit: Incensum istud a te bene+dictum ascendat ad te, Domine et descendat super nos misericordia tua.

Cum incensat altare dicit: Dirigatur Domine oratio mea sicut incensum in conspectu tuo eleuatio manuum mearum sacrificium vespertinum. Pone Domine custodiam ori meo et ostium circumstantie labiis meis ut non declinet cor meum in uerba malitie ad excusandas excusationes in peccatis.

Quando reddit turribulum Diacono dicit: Accendat in nobis Dominus ignem sui amoris et flamma eterne caritatis. Amen.

Quando Sacerdos lauat manus dicit Lavabo inter innocentes manus meas usque in finem cum Gloria Patri. Tunc inclinat se ante altare et dicit hanc orationem: Suscipe sancta Trinitas hanc oblationem quam tibi offerimus ob memoriam passionis resurrectionis et ascensionis Iesu Xpi Domini nostri: et in honorem beate Marie semper uirginis et beati Ioannis Baptiste et sanctorum Apostolorum Petri et Pauli et istorum et omnium sanctorum ut illis proficiat ad honorem nobis autem ad salutem et illi pro nobis intercedere dignentur in celis quorum memoriam agimus in terris. Per Xpm Dominum nostrum. Amen.

Erigens se deosculatur altare et uertens se ad populum dicat: Orate pro me fratres ut meum ac uestrum sacrificium acceptabile fiat apud Deum Patrem omnipotentem.
Circonstantes vero respondent: Suscipiat Dominus sacrificium de manibus tuis ad laudem et gloriam nominis sui ad utilitatem quoque nostram totiusque Ecclesie sue sancte. Amen.

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With the completion of the Gospel, the Priest shall say: I believe in one God, the Father Almighty, Maker of Heaven and Earth, and of all things visible and invisible.

And in one Lord, Jesus Christ, the only-begotten Son of God, begotten of the Father before all ages; God of God, Light of Light, true God of true God, begotten, not made, of one substance with the Father; by whom all things were made. Who for us men, and for our salvation, came down from Heaven, and was incarnate by the Holy Spirit of the Virgin Mary, and was made man. Who was crucified also for us under Pontius Pilate; He suffered and was buried, and the third day He rose again according to the Scriptures, and ascended into Heaven, and sits on the right hand of the Father. And He shall come again with glory to judge both the living and the dead; of His Kingdom there will be no end.

And in the Holy Spirit, the Lord and Giver of Life, who proceeds from the Father and the Son, who with the Father and the Son together is worshipped and glorified, who spoke by the Prophets. And in one, holy, catholic, and apostolic Church. I confess one baptism for the remission of sins. And I await for the resurrection of the dead, and the life of the world to come. Amen.

When the Priest offers the Host over the Altar, he shall say this prayer: Accept, O Holy Father, Almighty and Eternal God, this spotless host, which I, Your unworthy servant, offer to You, my living and true God, to atone for my numberless sins, offences, and negligences; on behalf of all here present and likewise for all faithful Christians living and dead, that it may profit me and them as a means of salvation to life everlasting. Amen.

When the water is poured in the Chalice, this prayer shall be said: O God, who established the nature of man in wondrous dignity, and still more admirably restored it; grant, that by the Mystery of this water and wine, we may come to share in the divinity of Him who deigned to become a partaker of our humanity, Jesus Christ Your Son, our Lord; Who lives and reigns with You, in the unity of the Holy Spirit; God, forever and ever. Amen.

Then is said: In the spirit of humility and with a contrite heart, may we be accepted by You, O Lord: and may our sacrifice be so offered this day in Your sight as to be pleasing to You, O Lord God.

The prayer shall be continued over the Host and Chalice, with the Sign of the Cross: Come, O Sanctifier, Almighty and eternal God, and bless + this sacrifice prepared for the glory of Your holy Name.

With the offering of the incense is said: Through the intercession of blessed Michael the Archangel, standing at the right hand of the altar of incense, and of all His elect may the Lord deign to bless + this incense and to receive it in the odor of sweetness; through Christ our Lord. Amen.

With the censing of the Oblations is said: May this incense blessed by You, arise before You, O Lord, and may Your mercy come down upon us.

With the censing of the Altar is said: Let my prayer, O Lord, like incense before You; the lifting up of my hands, like the evening sacrifice. O Lord, set a watch before my mouth, a guard at the door of my lips. Let not my heart incline to the evil of engaging in deeds of wickedness. (Ps. 141:2-4)

With the returning of the censer to the Deacon is said: May the Lord enkindle in us the fire of His love and the flame of everlasting charity. Amen.

When the Priest shall wash his hands, he shall say: I will wash my hands in innocence (Ps. 25 [26]:6-11) up to the end, with the Glory be to the Father.
Then he shall bow to the Altar and say this prayer: Accept, O holy Trinity, this oblation which we make to You in memory of the Passion, Resurrection and Ascension of Jesus Christ our Lord; and in honor of Blessed Mary ever-Virgin, of blessed John the Baptist, the holy Apostles Peter and Paul, of these and of all the Saints; that it may add to their honor and aid our salvation; and may they deign to intercede in Heaven for us who honor their memory here on Earth. Through the same Christ our Lord. Amen.

He shall rise, kiss the Altar, and turn around to the people, saying: Pray for me, brethren, that my Sacrifice and yours may be acceptable to God the Father Almighty.
Those round about shall respond rightly: May the Lord accept the Sacrifice from your hands, to the praise and glory of His Name, for our good and for that of all His holy Church, Amen.

The Mass as it was in Rome: the Roman Mass of the 15th century

In the year 1474, what is believed to be the very first printed edition (editio princeps) of the Roman Missal, known as the Missale Romanum Mediolani, was published in Milan. From that time on until Pope Pius V's 1570 edition of the Roman Missal, there were at least 14 different printings of Missals produced in Milan, Venice, Paris and Lyon that purported to present the text of the Mass as celebrated in Rome, rather than elsewhere, and which therefore were published under the title of "Roman Missal"; however even these editions show variations from each other.

The following text is the Ordo Missae of the aforementioned Missal (with some punctuations added and the medieval spelling 'fixed' I've now edited them back to reflect most of their original ortography and punctuation). One can notice that the Roman Rite had evolved much after about 600 years (partly due to the influence of the Gallican Rite to it); the Mass was more or less similar to its 'Tridentine' (or Pian) form.

THE ORDO MISSAE, TAKEN FROM THE 1474 MISSALE ROMANUM MEDIOLANI, Editio Princeps

Paratus Sacerdos cum intrat ad Altare dicat.
V./ Introibo ad Altare Dei.
R./ Ad Deum qui letificat iuuentutem meam.
Ps. Iudica me, Deus totum deinde repetitur versus Introibo ad Altare Dei.
R./ Ad Deum qui letificat iuuentutem meam.

Deinde facit Confessionem et Absolutionem et hinc dicit uersus.
V. Deus tu conversus uiuificabis nos.
R. Et plebs tua letabitur in te.
R. Ostende nobis Domine misericordiam tuam.
R. Et salutare tuum da nobis.
R. Domine exaudi orationem meam.
R. Et clamor meus ad te ueniat.
R. Dominus uobiscum.
R. Et cum spiritu tuo.

Aufer a nobis quesumus Domine iniquitates nostras ut ad Sancta Sanctorum puris mereamur mentibus introire. Per Xpm Dominum nostrum. Amen.

Postea inclinatus dicit secreto hanc orationem: Oramus te Domine per merita sanctorum tuorum quorum reliquie hic sunt, et omnium Sanctorum ut indulgere digneris omnia peccata mea. Amen.

Qua completa ascendit ad Altare et deosculans illud accipiensque turribulum a Diacono legit Introitum cum ministris deinde dicit an dicendum est:

Gloria in excelsis Deo et in terra pax hominibus bone voluntatis. Laudamus te. Benedicimus te. Adoramus te. Glorificamus te. Gratias agimus tibi propter magnam gloriam tuam. Domine Deus Rex celestis Deus Pater omnipotens. Domine Fili unigenite Iesu Xpe. Domine Deus Agnus Dei Filius Patris. Qui tollis peccata mundi miserere nobis. Qui tollis peccata mundi suscipe deprecationem nostram. Qui sedes ad dexteram Patris miserere nobis. Quoniam tu solus Sanctus. Tu solus Dominus. Tu solus Altissimus, Iesu Xpe. Cum Sancto Spiritu in gloria Dei Patris. Amen.
Quo finito antequam dicat Dominus uobiscum osculatur Altare in medio.

In fine Gradualis uel Alleluia uel Tractus inclinat se. Diaconus coram Altari et dicit hanc orationem:
Munda cor meum ac labia mea omnipotens Deus qui labia Ysaie prophete calculo mundasti ignito ita me tua grata miseratione dignare mundare ut sanctum Euangelium tuum digne ualeam nuntiare. Per Xpm Dominum nostrum. Amen.
Dicta oratione et accepto testu inclinat se Sacerdoti celebraturo et petit benedictionem dicendo: Iube domne benedicere. Tunc dicit Sacerdos: Dominus sit in corde tuo et in labiis tuis ut digne et competenter annunties Euangelium suum in nomine Patris et Filii et Spiritus Sancti. Amen.
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The Priest prepares to go to the Altar and says:
V./ I will go to the Altar of God.
R./ To God, the joy of my youth.
V./ Judge me, O God...(the whole Psalm is recited; then is repeated the verse:) I will go to the Altar of God.
R./ To God, the joy of my youth.

Afterwards the Confession and Absolution is made; then the following verse is said:
V. Turn to us, O God, and bring us life.
R. And Your people will rejoice in You.
V. Show us, Lord, Your mercy.
R. And grant us Your salvation.
V. O Lord, hear my prayer.
R. And let my cry come to You.
V. May the Lord be with you.
R. And with your spirit.

Take away from us, O Lord, we beseech You, our sins, that we may enter with pure minds into the Holy of Holies; through Christ our Lord. Amen.

Afterwards he shall bow and say the following prayer in secret: We beseech You, O Lord, by the merits of Your Saints, whose relics lie here, and of all the Saints, deign in your mercy to pardon me all my sins. Amen.

Completing these things, the Priest shall ascend to the Altar and kiss it, take the thurible from the Deacon, and with the ministers recite the Introit. Then he shall say or intone the following:
Glory to God in the highest, and on Earth peace to men of good will.
We praise You, We bless You, We adore You, We glorify You;
We give You thanks for Your great glory.
Lord God, heavenly King, God the Father Almighty.
Lord, the only-begotten Son Jesus Christ; Lord God, Lamb of God, Son of the Father.
You who take away the sins of the world, have mercy upon us.
You who take away the sins of the world, receive our prayer.
You who are seated at the right of the Father, have mercy upon us.
For You alone are Holy; You alone are the Lord.
You alone are the Most High, Jesus Christ, with the Holy Spirit, in the glory of God the Father. Amen.

When it is finished, he shall say The Lord be with you before kissing the Altar in the middle.
He shall then bow at the end of the Gradual, or the Alleluia, or the Tract. The Deacon shall come before the Altar and say the following prayer:
Cleanse my heart and my lips, O Almighty God, who cleansed the lips of the Prophet Isaiah with a burning coal. Through Your gracious mercy deign so to purify me that I may worthily proclaim Your holy Gospel; through Christ our Lord. Amen.
After saying the prayer and taking the Text, he shall bow before the celebrant Priest and ask for a blessing, saying: Grant, sir, to bless. Then the Priest shall say:May the Lord be in your heart and on your lips that your may worthily and fittingly proclaim His Gospel; in the name of the Father, and of the Son and of the Holy Spirit. Amen.