Former Owner
- Leicester Harmsworth1
- Leonard Grey, 1st Viscount Grane1
- Levi, David, active 19th century1
- Lionardo di Paolo Adimari1
- Lodovicus Saltariellus1
- Lorenzo Antonio da Ponte1
- Louis César de La Baume Le Blanc1
- Louis Lamm1
- Louis Thompson Rowe1
- Ludwig Rosenthal's Antiquariaat1
- Luis Fernández de Córdoba y Aragón1
- Madeleine Cosman1
- Madyan Qusuni1
- Maggs Bros Ltd1
- Malachia Ormanian1
- Manoel Pereira da Sylva1
- Marcantonio Contarini1
- Mario Maffei1
- Mark Lansburgh1
- Martin Breslauer1