O quam pulchra es casta

Source: 
Roma, Biblioteca Vallicelliana, C.5
Folio: 
083v
Sequence: 
4
Feast: 
Purificatio Mariae
Office/Mass: 
M
Genre: 
A
Position: 
1.6
Cantus ID: 
004069
Mode: 
7
Differentia: 
3
Differentia database: 
1--l-l-m-l-k-jkJ--4 144o