- Gregorian chants--Manuscripts31
- Gregory I, Pope, approximately 540-6045
- Gregory IX, Pope, approximately 1170-12412
- Gregory XIII, Pope, 1502-15855
- Gregory XV, Pope, 1554-16231
- Gregory, of Nazianzus, Saint2
- Grief--Religious aspects--Islam1
- Grifoni, Antonio de'1
- Grifoni, Michele de'1
- Grigor, Tatʻevatsʻi, Saint, 1346-14091
- Grisaille painting1
- Griselda (Legendary character)1
- Gritti, Andrea, 1455-15381
- Grossa, Dora active 16th century1
- Groundwater1
- Gr̥hyasutras1
- Guanzi (Guan, Zhong)1
- Guardi, Gabriele1
- Guardian and ward8
- Guasconi, Pierantonio1