Former Owner
- Charles Kothen1
- Charles Louis Adelaïde Henri Matheron Curnieu1
- Charles Marriette1
- Charles Seymour, 6th Duke of Somerset1
- Charles Singer1
- Charles Stephen Ascherson1
- Charles Stuart, 1st Baron Stuart de Rothesay1
- Charles-Gilbert Morel de Vindé1
- Chartreuse Saint-Sixte de Rettel1
- Chasseigne family1
- Clarence Howard Clark, Sr.2
- Clarence S. Bement3
- Claude Augustin de Cosson1
- Clemente Carilli1
- Cobham, H. W., 1867-1
- Coella Lindsay Ricketts1
- Collegium Germanicum et Hungaricum1
- Coluccio Salutati1
- Count Johann Nepomuk Wilczek1
- Cox Macro1