Former Owner
- Llewelyn Lloyd-Mostyn, 3rd Baron Mostyn of Mostyn1
- Lorenzo Berdute1
- Louis Hercule Timoléon de Cossé-Brissac1
- Luis Escobet1
- Mannucci family1
- Marcianus F. Rossi1
- Mark Augspürger1
- Matteo Luigi Canonici1
- Matthias Corvinus1
- Maurilio Morazio1
- Merlemont family1
- Michael Wodhull1
- Michiel family1
- Murray Anthony Potter1
- Museo Cavaleri1
- Nettie Goldsmith Naumburg1
- Neustift Abbey1
- Nicolai Briganti1
- Nicolas Moreau1
- Nicolaus de Monte Murro1