Columbia subject headings:
Collegio Germanico. Library--Catalogs.
Early printed books--16th century--Exhibitions.
Gregory XIII, Pope, 1502-1585--Library--Exhibitions.
Incunabula--Exhibitions.
Harvard subject headings:
Collegio Germanico. Library--Catalogs.
Early printed books--16th century--Exhibitions--Catalogs.
Early printed books--Vatican City--16th century--Bibliography--Exhibitions.
Gregory XIII, Pope, 1502-1585--Library--Catalogs.
Gregory XIII, Pope, 1502-1585--Library--Exhibitions.
Incunabula--Catalogs.
Incunabula--Exhibitions--Catalogs.
Incunabula--Vatican City--Bibliography--Exhibitions.
Pontificia Università lateranense. Biblioteca generale "Pio IX"--Catalogs.
Private libraries--Italy--Exhibitions.
Princeton subject headings: