Former Owner
- Ball Collection2
- Baptist Union Theological Seminary2
- Barbarigo family1
- Barbe de Laon1
- Baron Llangattock1
- Bartolomeo Amici1
- Bartolomeo di Larione Martelli1
- Bateman family1
- Battista di Ser Cicco di Fermo1
- Battle Abbey1
- Beatrice de Fouar1
- Beatus Rhenanus1
- Beinecke Rare Book & Manuscript Library1
- Benedetto Affaticati2
- Benjamin Franklin Stevens1
- Benoît Le Court1
- Bern Dibner1
- Bernard Halliday1
- Bernard M. Rosenthal15
- Bernard Quaritch2