Ordines Romani
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The Ordines Romani (Latin for Roman Ordines), the are collections of documents that are the rubrics for the Medieval Mass of the Roman Rite.
They span many centuries throughout the Middle Ages.
The rubrics for the Liturgy are found in Ordines I, VII, IX-X, XV-XVII.
Those for Baptism are found in Ordines XI, XXII-XXIV and XXV.
Those for Ordination are found in Ordines XXXIV-XXXV, and XXXIX.
Those for Funerals are found in Ordo XLIV.
Finally, those Ordines that deal with the Dedications of Churches are found in Ordines XLI-XLIII.
The oldest Ordo is Ordo XI which is from around AD 650 and concerns Baptism. The most complete compilation available to the scholar was written by a Frenchman with the last name of Andrieu.