- Di Giovanni, Francesco1
- Di Meo, Antonio, 1947-1
- Di Pietro, Giovanni1
- Di Stefano, Antonio1
- Diagnosis1
- Dialogi (Gregory I, Pope)1
- Dialogues1
- Didactic literature, Latin1
- Didactic literature, Latin (Medieval and modern)1
- Diggele, Robert, active 1364-13741
- Dini, Francesco1
- Diocletian, Emperor of Rome, 245-3131
- Dionysius, the Areopagite, Saint, active 1st century1
- Directories1
- Discoveries in geography1
- Discoveries in geography--French1
- Diseases1
- Divine Office (Music)1
- Divinity of Christ1
- Dolfi, Dolfo1