Former Owner
- Lajos Graf Apponyi de Nagy-Appony1
- Lambach Abbey1
- Lancino Curti1
- Laurence William Hodson1
- Leonhardus Cuntius1
- Leopold Gruber1
- Lionardo di Paolo Adimari1
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Louis César de La Baume Le Blanc1
- Louis Hercule Timoléon de Cossé-Brissac1
- Louis-Jean-Nicolas Monmerqué1
- Ludovico Settala1
- Luini, Pacifico (Franciscan priest), active 19th century1
- Luis Escobet1
- Luis Fernández de Córdoba y Aragón1
- Madeleine Cosman1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Mario Maffei1