- Uguccioni, Benedetto2
- Uguccioni, Carlo1
- Ukraine--Kam'i︠a︡net︠s︡ʹ-Podilʹsʹkyĭ1
- Ukraine--Manhup-Kale (Extinct city)1
- Ulivieri, Petronio1
- Universidad de México1
- Universidad de Salamanca1
- Universities and colleges1
- Universities and colleges--Faculty2
- Università di Bologna1
- Universität Wien. Kollegium St. Nikolaus1
- Unmūdhaj fī al-naḥw (Zamakhsharī, Maḥmūd ibn ʻUmar)1
- Urjūzah al-Raḥbīyah (Ibn al-Mutafanninah, Muḥammad ibn ʻAlī)2
- Urjūzah fī al-ṭibb (Avicenna)1
- Urmawī, Sirāj al-Dīn Maḥmūd ibn Abī Bakr, 1198-1283. Maṭāliʻ al-anwār1
- Urraca, Infanta de Zamora, 1033?-11011
- Ustarūshanī, Muḥammad ibn Maḥmūd, -1234 or 1235. Fuṣūl1
- Uzbekistan--Bukhoro1
- Uzbekistan--Samarqand1
- Vallombrosans1