Former Owner
- Lewis L. Gould4
- Lima Public Library1
- Lionel Tollemache, 4th Earl of Dysart1
- Lisa Kiser4
- Llanthony Priory1
- Louis II, Count of Flanders1
- Louis N. Cassett1
- Lucrezio Palladio degli Olivi1
- Ludwig Rosenthal1
- Luigi Arrigoni2
- Lyon Cathedral1
- Léon Gruel1
- L’Art Ancien1
- Maggs Bros Ltd4
- Maksymilian Mielzynski1
- Mannheimer Hofbibliothek1
- Marchese Linterno2
- Margaret Anna Hazard1
- Marie-François Duchesne de Beaumanoir2
- Martin Schøyen1