- Temperance--Biblical teaching1
- Tempio francescano di S. Lorenzo (Vicenza, Italy)1
- Tenth of Tevet1
- Testamentum (Francis, of Assisi, Saint)1
- Tetragrammaton1
- Teutonic Knights1
- Textile industry1
- Theban Legion (Legendary saints)1
- Theodore, Bishop of Mopsuestia, approximately 350-428 or 4291
- Theology, Doctrinal--Middle Ages1
- Theology, Practical1
- Theology--Early church1
- Theology--Study and teaching--Catholic Church1
- Therapeutics1
- Theseus, King of Athens1
- Thilla, Berto1
- Third Order Regular of St. Francis1
- Third Order Secular of St. Francis1
- Third orders1
- Thomas, à Becket, Saint, 1118?-11701