Former Owner
- Mirmellus Arnandi1
- Miss Gostling1
- Mistrie, Sita Ram, Pandit1
- Mitchell Starrett Buck1
- Mohamed. Makiya1
- Moissac Abbey1
- Molin1
- Monasterio de El Paular1
- Monastery at San Gregorio al Celio1
- Monastery of Benevívere1
- Monastery of Saint Peter (Erfurt, Germany)1
- Monastery of San Bartolmeo, Arezzo, Tuscany1
- Monica Franklyn1
- Monsieur de Bel Air1
- Moor of Ireton1
- Morell Thurston1
- Moritz Dessauer1
- Moritz Joseph Johann von Dietrichstein1
- Morot1
- Mortimer Frank1