- Stefani, Nicola1
- Stefano, Caterina di1
- Stefano, Niccolò di1
- Stefano, Simone di1
- Strozzi, Giovanni1
- Strozzi, Nanni, 1376-14271
- Symptoms1
- Süleyman I, Sultan of the Turks, 1494 or 1495-15661
- Tacketed bindings1
- Tactics1
- Tasʹhīl al-fawāʼid wa-takmīl al-maqāṣid (Ibn Mālik, Muḥammad ibn ʻAbd Allāh)1
- Taxation, Papal1
- Tenth century1
- Theology, Doctrinal1
- Thilla, Berto1
- Third Order Regular of St. Francis1
- Third Order Secular of St. Francis1
- Third orders1
- Tiberius, Emperor of Rome, 42 B.C.-37 A.D.1
- Ties1