Former Owner
- Lucien Delamarre1
- Lycée Louis-le-Grand1
- Léon Techener1
- M. Lee1
- M. Pierre Guarin1
- Marco da Bologna1
- Marie-François Duchesne de Beaumanoir1
- Marion H. Gottfried1
- Martin of Aragon1
- Marvin-L. Colker1
- Mary W. T. Dickinson1
- Mayer Sulzberger1
- Meschatin La Faye family1
- Michael Greenberg1
- Mikhail Golitsyn1
- Monasterio de El Paular1
- Monastery of Saint Peter (Erfurt, Germany)1
- Moor of Ireton1
- Mount Zion Abbey1
- Mrs. F. W. Bartlett1