- De mundo (Aristotle)1
- De oratore (Cicero, Marcus Tullius)1
- Deadly sins1
- Debts, External1
- Dedications1
- Definition (Philosophy)1
- Della Rovere, Francesco Maria, duca d'Urbino, 1548-16311
- Demosthenes1
- Dentelle bindings1
- Detti, Giovanni Baptista1
- Devices (Provenance)1
- Devil--Islam1
- Devonshire, Edward Courtenay, Earl of, 1526-15561
- Devotio moderna1
- Devotion to the Blessed Virgin Mary1
- Devotional literature, Sanskrit1
- Di Giovanni, Francesco1
- Dialogues (Literature)1
- Didactic literature, German1
- Dioceses1