- Trials4
- Tristan (Legendary character)2
- Trojan War2
- Truffaldi, Branca1
- Turkey--Beyşehir1
- Turkey--Erzincan1
- Turkey--Erzurum1
- Turkey--Kütahya1
- Turkey--Troy (Extinct city)3
- Twelfth century35
- Umm al-barāhīn fī ʻilm al-kalām (Sanūsī, Muḥammad ibn Yūsuf)1
- Unmūdhaj fī al-naḥw (Zamakhsharī, Maḥmūd ibn ʻUmar)1
- Urjūzah al-Raḥbīyah (Ibn al-Mutafanninah, Muḥammad ibn ʻAlī)1
- Urmawī, Sirāj al-Dīn Maḥmūd ibn Abī Bakr, 1198-1283. Maṭāliʻ al-anwār2
- Usury1
- Utraquists1
- Uzzano, Alessandro da1
- Uzzano, Angelo da2
- Uzzano, Giovanni da, active 15th century1
- Val Secret (France)1