- Devotional literature, English (Middle)1
- Devotional literature, French1
- Devotional literature, German1
- Di Leone, Francesco1
- Di Leone, Giovanni1
- Dialogues1
- Didactic poetry, Latin1
- Didactic poetry, Latin (Medieval and modern)1
- Diocletian, Emperor of Rome, 245-3131
- Dionysius, the Areopagite, Saint, active 1st century1
- Dissenters, Religious1
- Divination1
- Divine Office (Music)1
- Divine office (Music)1
- Divine right of kings1
- Domitian, Emperor of Rome, 51-961
- Duarte, King of Portugal, 1391-14381
- Dulaert, Johannes1
- Dutch poetry1
- Dyes and dyeing1