- Textile industry1
- The Great Western Schism (1378-1417)1
- Theodore, Bishop of Mopsuestia, approximately 350-428 or 4291
- Theological anthropology--Christianity1
- Theological virtues1
- Theology, Doctrinal--Catholic authors1
- Theology, Practical1
- Theology--Study and teaching--Catholic Church1
- Thilla, Berto1
- Third Order Regular of St. Francis1
- Third Order Secular of St. Francis1
- Third orders1
- Thomas de Grinham1
- Thomas, à Becket, Saint, 1118?-11701
- Thomists1
- Thyestes, King of Olympia and Mycenae (Mythological character)1
- Tiberius, Emperor of Rome, 42 B.C.-37 A.D.1
- Tibullus1
- Tides1
- Time1