- Süleyman I, Sultan of the Turks, 1494 or 1495-15661
- Tactics1
- Tarquinius Superbus, Lucius, King of Rome, active 534 B.C.-510 B.C.1
- Taviani, Alamanno1
- Tax collection1
- Testamentum (Francis, of Assisi, Saint)1
- Teutonic Knights1
- Theban Legion (Legendary saints)1
- Theology, Doctrinal1
- Theology--Study and teaching--Catholic Church1
- Theseus, King of Athens1
- Thilla, Berto1
- Third Order Secular of St. Francis1
- Third orders1
- Titles of honor and nobility1
- To 15001
- To 15091
- Tommaso, Angiolo di1
- Tommaso, Guido di1
- Tommaso, Guidone di1