Author
- Tabrīzī, ḥasan ibn Sharaf, d. 13681
- Taddeo Alderotti1
- Taftāzānī, Masʻūd ibn ʻUmar, 1322-1389?1
- Thomas Malyus1
- Thomas Waleys1
- Thomas à Kempis1
- Titus Livius1
- Todros ben Joseph Abulafia1
- Torelli family1
- Uffizio della mercanzia of Florence1
- Ulugh Beg1
- Università de' mercanti (Siena)1
- Urban V1
- Usuard1
- Uthman bin Ali Zayla'i1
- Vegetius1
- Vigliano d'Asti1
- Walter Burley1
- Werner Rolevinck1
- William of Montlauzun1