Former Owner
- Mary Lacaita1
- Matthew Donadski1
- Matthew Simpson Parkhurst1
- Menno Hertzberger1
- Michaeliskonvent1
- Minerva Kaiser1
- Morton Davis Mitchell1
- Mrs. E.J. Hooper1
- Museo Cavaleri1
- N. Pauli1
- Neuwerk Nunnery1
- Nicolaus Pol1
- Nonnberg Abbey1
- Ochsenhausen Abbey1
- Oliver R. Barrett1
- Oswald Carl Friedrich von Seilern und Aspang1
- Otto Ege1
- Otto Haas1
- Percy Mordaunt Barnard1
- Petrus Hofman Peerlkamp1