Former Owner
- Barbe de Laon1
- Baron Llangattock1
- Baron Lovel1
- Baron Paul Adolphe Dieudonné Thiébault1
- Bartholdus and Johann Flachmann1
- Bartolomeo Amici1
- Basilica of Sant'Ambrogio1
- Basilica of Santa Maria Novella1
- Basilios Bessarion1
- Bateman family2
- Battista di Ser Cicco di Fermo1
- Battle Abbey1
- Beatrice de Fouar1
- Beauvais Cathedral3
- Beinecke Rare Book & Manuscript Library1
- Benedetto Affaticati2
- Benedetto Pistrucci1
- Benetto Spinelli1
- Benignus of Dijon1
- Benjamin Ashworth1