Former Owner
- Clara von Vorssel1
- Clarence Howard Clark, Sr.1
- Clarence S. Bement1
- Clement VII1
- Comte d'Aspremont-Lynden1
- D. Manning1
- Dame Margery Byrkenhed1
- Damiano Muoni1
- Daniele Florio1
- David Gordon Lyon1
- David P. Wheatland1
- David Pulsifer1
- David Weinglass1
- David Wolfe Bruce1
- Dawson Turner1
- Diego Clemencín1
- Diego Llorente1
- Diego de Arce y Reinoso1
- Domenico Levera1
- Dorothy Stahl Brady1