Former Owner
- Karl F. Morrison2
- Karl Leopold Strauven1
- Karl Theodor Völcker's Verlag Und Antiquariat3
- Karl Wilhelm Hiersemann9
- Katharinenkirche, Nuremberg1
- Katherine Somerset Wyttenbach Fenwick5
- Keifer1
- Keith Jarvis4
- Kenneth Hyde1
- Kenneth J. "Bud" Jennings2
- Kloster Kuringen1
- Kloster Rebdorf2
- Konrad von Maurer1
- Kulturhistorisches Museum Magdeburg1
- L. C. Harper1
- Lady Frances Bentinck1
- Lady Margaret Ayloffe1
- Lajos Graf Apponyi de Nagy-Appony1
- Lambach Abbey2
- Lambertus Eerens1