- Greek language--Grammar1
- Greek literature--Translations into Latin1
- Gregorian chants12
- Gregorian chants--Instruction and study1
- Gregorian chants--Manuscripts8
- Gregory I, Pope, approximately 540-6042
- Gregory XIII, Pope, 1502-15851
- Gritti, Andrea, 1455-15381
- Guardi, Gabriele1
- Guardian and ward7
- Guasconi, Pierantonio1
- Guelfo, Martino di1
- Guelfs and Ghibellines1
- Guglielmo, Antonio di1
- Guidalotti, Antonia1
- Guidiccioni, Giovanni, 1500-15411
- Haggadah1
- Hagiography3
- Haimo, of Auxerre, -approximately 8551
- Half bindings2