- Detti, Giovanni Baptista1
- Devotional calendars--Coptic Church1
- Devotional exercises1
- Devotional literature41
- Devotional literature, English (Middle)2
- Devotional literature, French1
- Devotional literature, German1
- Devotional literature, Italian12
- Devotional poetry, Arabic1
- Di Leone, Francesco1
- Di Leone, Giovanni1
- Diagnosis1
- Dictionaries20
- Didactic literature, German1
- Didactic poetry, Latin3
- Didactic poetry, Latin (Medieval and modern)1
- Dioceses3
- Diocletian, Emperor of Rome, 245-3131
- Dionysius, the Areopagite, Saint, active 1st century1
- Diplomatic and consular service, Venetian1