Columbia subject headings:
Church history.
Petrarca, Francesco, 1304-1374--Anniversaries, etc.--Exhibitions.
Petrarca, Francesco, 1304-1374--Exhibitions.
Petrarca, Francesco, 1304-1374--Religion.
Harvard subject headings:
Fathers of the church--Bibliography--Exhibitions.
Petrarca, Francesco, 1304-1374--Anniversaries, etc.--Exhibitions.
Petrarca, Francesco, 1304-1374--Exhibitions.
Princeton subject headings:
Petrarca, Francesco, 1304-1374--Homes and haunts--Italy--Arezzo--Congresses.
Petrarca, Francesco, 1304-1374--Religion--Congresses.