Magnum mysterium declaratur

Source: 
Roma, Biblioteca Vallicelliana, C.5
Folio: 
057v
Sequence: 
7
Feast: 
Octava Epiphaniae
Office/Mass: 
L
Genre: 
A
Position: 
5
Cantus ID: 
003678
Mode: 
7
Differentia: 
2
Differentia database: 
1--l-l-m-l-lk-l--4 147c