Former Owner
- Brinton, Daniel G. 1837-18991
- Bristol Baptist College1
- Bruce P. Ferrini1
- Brudenell family1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- Burndy Library4
- Bury St Edmunds Abbey2
- Buxheim Charterhouse6
- Byron Reed1
- Bākīr ibn Muṣṭafá Fūṭī1
- Bīkānera Anūpa Saṃskr̥ta Pustakālaya1
- Būtū ʻAbd al-Bāqī1
- C.B1
- Caesareum Societatis Jesu Collegium Viennense1
- Carl Frederick Haussmann1
- Carl Hermann Grabauer1
- Carl Reinhardt4
- Carleton Rubira Richmond1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1