Former Owner
- Manoel Pereira da Sylva1
- Manoel S. Pinto1
- Manuel John Johnson1
- Mark Lansburgh1
- Markus Fugger1
- Martin Picker1
- Mary Augusta Strachey1
- Mary Schell Collins1
- Mary Talbot, Countess of Shrewsbury1
- Maximilian Henry of Bavaria1
- Merlemont family1
- Michael M. Zagayski1
- Michiel family1
- Moritz Joseph Johann von Dietrichstein1
- Mortimer Loeb Schiff1
- Museo Cavaleri1
- Muḥammad Amīn al-Sabtī al-Alūsī Anṣārī1
- Muḥammad Anīs Ṭālawī1
- Muḥammad ʻAwwād ibn Ḥusayn Afandī1
- Muṣṭafá Ṣidqī1