Former Owner
- Talcott Williams2
- Tammaro De Marinis1
- Taqī ibn ʻAlī al-Qummī1
- Theodore William John Wylie1
- Thomas Appleby1
- Thomas Bateman1
- Thomas Eyre1
- Thomas G. Bergin1
- Thomas Grenville1
- Thomas Moore1
- Thomas Phillipps39
- Thomas Stonor, 3rd Baron Camoys1
- Thomas Syddell1
- Thomas Thomson1
- Thomon Simon Jones1
- Tommaso Compeggio1
- Tours Cathedral1
- Turner Macan1
- Typographic Library and Museum2
- Ulrich Fugger1