Former Owner
- Luis Fernández de Córdoba y Aragón1
- Madeleine Cosman1
- Maggs Bros Ltd1
- Malachia Ormanian1
- Malvezzi de' Medici1
- Manūchihr Nukhastīn Āṣaf Qājār1
- Markus Fugger1
- Mary Augusta Strachey1
- Maximilian Henry of Bavaria1
- Mayer Sulzberger1
- Mazliah Finzi1
- Monastero di Santo Spirito in Verona1
- Moritz Dessauer1
- Moritz Joseph Johann von Dietrichstein1
- Muḥammad Dhará1
- Muḥammad Riz̤ā1
- Muḥammad ibn Jaʻfar Yaḥyá1
- Muḥammad Ṣābir1
- Muṣṭafa Ṣidḳī1
- Muṣṭafá Shāh ʻAlāʼī1