- Didactic literature, English (Middle)1
- Didactic literature, Latin (Medieval and modern)1
- Dion, approximately 408 B.C.-354 B.C.1
- Diplomatic documents1
- Directories1
- Discipline1
- Discoveries in geography1
- Diseases1
- Divination1
- Divine office (Music)1
- Drake, Francis, approximately 1540-15961
- Druzes1
- Dudley family1
- Durandus, of Saint-Pourçain, Bishop of Meaux, approximately 1275-13341
- Easter1
- Edge titles1
- Education1
- Education, Elementary1
- Education, Medieval1
- Edward VI, King of England, 1537-15531