Ecclesia virtute roboratur

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
265v
Sequence: 
1
Feast: 
Martini
Office/Mass: 
M
Genre: 
R
Position: 
2.4
Cantus ID: 
006621
Mode: 
1
Addendum: 
P: 401