Former Owner
- Luigi Cora1
- Luis Mayora1
- Mademoiselle de Malberghe1
- Madyan Qusuni1
- Maffeo Pinelli1
- Maggs Bros Ltd24
- Malachia Ormanian1
- Mannucci family1
- Mantell1
- Marc-René de Voyer d'Argenson1
- Marcantonio V Borghese1
- Marcela Gabriela1
- Marchese Porri-Carcani1
- Marco Antonio Morosini1
- Margaret Barclay Wilson1
- Margaret F. Woodward1
- Margaret Le Seigneur1
- Margaret of Croy1
- Margareta van der Dycke1
- Margaretha van Cleyburg1