Former Owner
- Juan de Aillon1
- Juan de Torquemada1
- Julius de Cardelinis1
- Lajos Graf Apponyi de Nagy-Appony1
- Lancino Curti1
- Laurence William Hodson1
- Leonardo Bruni1
- Leopold Gruber1
- Lionardo di Paolo Adimari1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Louis César de La Baume Le Blanc1
- Luini, Pacifico (Franciscan priest), active 19th century1
- Malachia Ormanian1
- Mannucci family1
- Mario Maffei1
- Matteo Luigi Canonici1
- Matthias Corvinus1
- Mazliah Finzi1
- Michael Wodhull1
- Michel Chasles1