Chapter 21ChrP.5.21
De institucione octave nativitatis beate Marie.
The Octave of Mary's Nativity
A rubric introducing the observance of the octave of the Nativity of the Blessed Virgin Mary, with a brief source reference.
of the Virgin Mary to be celebrated, chapter… (Ptolemy)
Read the original Latin
virginis Marie celebrari c. (Ptol )
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