- Talbot, Gilbert, Sir, of Grafton1
- Talkhīṣ aʻmāl al-ḥisāb (Ibn al-Bannāʼ, Aḥmad ibn Muḥammad)1
- Tancredini, Giovanni1
- Tancredini, Lorenza1
- Taviani, Alamanno1
- Taxation, Papal1
- Testamentum (Francis, of Assisi, Saint)1
- Theology1
- Theology--Study and teaching--Catholic Church1
- Thilla, Berto1
- Third Order Secular of St. Francis1
- Third orders1
- Thyestes, King of Olympia and Mycenae (Mythological character)1
- Titles of honor and nobility1
- To 15091
- To 18211
- Toletanus, Alphonsus Corduba1
- Tommaso, Angiolo di1
- Tommaso, Guido di1
- Tommaso, Guidone di1