Quem dicunt homines esse

Source: 
Oxford, Bodleian Library, MS. Canon. Liturg. 202 (olim 19314)
Folio: 
044r
Sequence: 
20
Feast: 
Cathedra Petri
Office/Mass: 
L
Genre: 
A
Position: 
B
Cantus ID: 
004454
Mode: 
?
Differentia: 
*