Former Owner
- Antonio Cánovas del Castillo1
- Antonio Ubaldini1
- Antonio de Bonius1
- Arnold Jansen op de Haar1
- Arnold Mettler1
- Arthur Kay1
- Athelstan Riley1
- Austin, Jehan1
- Avraham ben ʻAlon1
- Aḥmad al-Mudarris1
- Baptist Union Theological Seminary1
- Benediktinerinnenabtei St. Walburg1
- Benoît Le Court1
- Bentley Lyonel John Tollemache, 3rd Baron Tollemache1
- Bernard M. Rosenthal1
- Boies Penrose II1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- C. W. S. Dixon1
- Caesareum Societatis Jesu Collegium Viennense1