- Theology--Early church1
- Theology--Manuscripts3
- Theology--Middle Ages2
- Theology--Study and teaching--Catholic Church1
- Theseus, King of Athens1
- Thilla, Berto1
- Third Order Regular of St. Francis1
- Third Order Secular of St. Francis1
- Third orders1
- Thirteenth century46
- Thomas, Apostle, Saint, active 1st century1
- Thomas, Aquinas, Saint, 1225?-12741
- Thomists1
- Thumb indexes2
- Thyestes, King of Olympia and Mycenae (Mythological character)1
- Tiberius, Emperor of Rome, 42 B.C.-37 A.D.1
- Tides1
- Ties1
- Time1
- Timur, 1336-14052