Former Owner
- Barbe de Laon1
- Baron Paul Adolphe Dieudonné Thiébault1
- Bartolomeo Amici1
- Basilica of Santa Maria Novella1
- Bateman family2
- Beatus Rhenanus1
- Benjamin Franklin Stevens1
- Bernard Halliday1
- Bernard Quaritch1
- Bernardo Bembo1
- Bertram Ashburnham, 4th Earl of Ashburnham4
- Biblioteca Bottigella1
- Biblioteka Tulezynska1
- Bibliotheca Beggadorum1
- Bill Ward1
- Birgittinessenklooster Mariënwater1
- Boies Penrose1
- Bruce Bannerman1
- Bury St Edmunds Abbey1
- Buxheim Charterhouse4