- Süleyman I, Sultan of the Turks, 1494 or 1495-15661
- Tasʹhīl al-fawāʼid wa-takmīl al-maqāṣid (Ibn Mālik, Muḥammad ibn ʻAbd Allāh)1
- Tax collection1
- Taxation1
- Theology, Doctrinal--Middle Ages1
- Thirteenth century1
- Thirty Years' War (1618-1648)1
- Tides1
- To 18211
- Translations1
- Transmutation (Chemistry)1
- Trials, litigation, etc.1
- Turkish Wars (Venice, Italy : 1453-1571)1
- Uguccioni, Benedetto1
- Uguccioni, Carlo1
- Universidad de Salamanca1
- Universidad de Zaragoza1
- Verdugo, Pedro1
- Vincenzo I Gonzaga, Duke of Mantua, 1562-16121
- Volvelles1