Former Owner
- Luis Ordoñez1
- Luther Albertus Brewer1
- Lutheran Theological Seminary at Philadelphia1
- Lycée Louis-le-Grand1
- Lyon Cathedral1
- Léon Gruel1
- Léon Techener1
- L’Art Ancien1
- M. De La Tour1
- M. Favia del Core1
- M. Haimmiller1
- M. Lee1
- M. Louise Stowell1
- M. Pierre Guarin1
- Madeleine Cosman1
- Mademoiselle de Malberghe1
- Madyan Qusuni1
- Madyājñika Devakṛṣṇa1
- Maffeo Pinelli1
- Magby, H1