- Tarquinius Superbus, Lucius, King of Rome, active 534 B.C.-510 B.C.1
- Tasʹhīl al-fawāʼid wa-takmīl al-maqāṣid (Ibn Mālik, Muḥammad ibn ʻAbd Allāh)1
- Taxation1
- Taxation, Papal1
- Taḥanun (Jewish prayer)1
- Tefillin1
- Tempio francescano di S. Lorenzo (Vicenza, Italy)1
- Ten commandments1
- Terence1
- Textbooks1
- Theban Legion (Legendary saints)1
- Theology, Doctrinal--Middle Ages1
- Theology, Practical1
- Theology--Early church1
- Theology--Middle Ages1
- Theology--Study and teaching--Catholic Church1
- Third Order Regular of St. Francis1
- Thomas, Aquinas, Saint, 1225?-12741
- Tides1
- Ties1