Former Owner
- Leo Olschki1
- Leonello d'Este, Marquis of Ferrara1
- Long Island Historical Society, Maine1
- Lorenzo Antonio da Ponte1
- Louis Charles Karpinski1
- Louis Herbert Gray1
- Louis Loewe1
- Louis XIV of France1
- Luigi Celotti1
- Luigi Serra di Cassano1
- Lydia Thompson Morris1
- M. Louise Stowell1
- Magby, H1
- Mahdī ibn Muṣṭafá al-Ḥusaynī1
- Manookjee Sorabjee Ashburner1
- Manuel Fernández del Castillo1
- Manuel John Johnson1
- Marc-René de Voyer d'Argenson1
- Marie Thomas1
- Mary Stanley, Countess of Derby1