Former Owner
- Karen L. Gould3
- Karl Wilhelm Hiersemann6
- Katharinenkirche, Nuremberg1
- Katherine Somerset Wyttenbach Fenwick1
- Konrad von Maurer3
- L. Paganthus1
- Lady Frances Bentinck1
- Lambach Abbey1
- Lathrop C. Harper, Inc.1
- Laurence Claiborne Witten II1
- Laurent Campagne1
- Lawrence J. Schoenberg23
- Legoué1
- Leo Olschki1
- Leonard Baskin1
- Leonhardus Cuntius1
- Leopold Gruber1
- Lewis L. Gould2
- Libreria antiquaria Mediolanum1
- Libreria la Bibliofila1