- De anima (Aristotle)1
- De bello Gallico (Caesar, Julius)1
- De generatione et corruptione (Aristotle)1
- De gradibus humilitatis et superbiae (Bernard, of Clairvaux, Saint)1
- Death1
- Death and burial of a person1
- Death registers1
- Deeds1
- Despotism1
- Devices (Heraldry)1
- Devotional literature, Italian1
- Didactic literature, Latin (Medieval and modern)1
- Diggele, Robert, active 1364-13741
- Dionysius, the Areopagite, Saint, active 1st century1
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- Divine office1
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