- Taxation, Papal1
- Testamentum (Francis, of Assisi, Saint)1
- The Great Western Schism (1378-1417)1
- Theology, Doctrinal--Middle Ages1
- Theology--Middle Ages1
- Theology--Study and teaching--Catholic Church1
- Thilla, Berto1
- Third Order Secular of St. Francis1
- Third orders1
- Thomas, Aquinas, Saint, 1225?-12741
- Thyestes, King of Olympia and Mycenae (Mythological character)1
- Ties1
- To 15001
- To 15091
- Toletanus, Alphonsus Corduba1
- Tommaso, Angiolo di1
- Tommaso, Guido di1
- Tommaso, Guidone di1
- Tommaso, Simone di1
- Tonda, Arrigo da1