O quam pulchra es casta

Source: 
Tongeren, Onze-Lieve-Vrouw-Kerk (Our Lady's Church), 64 (olim IV)
Folio: 
237v
Sequence: 
5
Feast: 
Comm. unius Virginis
Office/Mass: 
M
Genre: 
A
Position: 
1.3
Cantus ID: 
004069
Mode: 
7
Differentia: 
C1
Differentia database: 
1--l-l-lm-l-k-jk--4 144c