In medio ecclesiae aperuit

Source: 
Roma, Biblioteca Vallicelliana, C.5
Folio: 
040v
Sequence: 
2
Feast: 
Joannis Evang.
Office/Mass: 
M
Genre: 
A
Position: 
2.6
Cantus ID: 
003255
Mode: 
1
Differentia: 
3
Differentia database: 
1--h-h-g-f-gh-gf--4 69b