- Cáceres Gatica, Alonso de1
- Dante Alighieri, 1265-13211
- 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
- De la Peña family1
- Death registers1
- Debt cancellation1
- Debtor and creditor1
- Dedications1
- Deeds1
- Despotism1
- Devotional exercises1
- Devotional literature, Italian1
- Diaries1
- Didactic literature, Latin (Medieval and modern)1
- Diggele, Robert, active 1364-13741
- Dionysius, the Areopagite, Saint, active 1st century1
- Diplomatic documents1