Former Owner
- Cornelius John Hauck1
- Corp. Thomas Tay1
- Cosimo de' Medici1
- Count Alexis de Golowkin1
- Count Johann Nepomuk Wilczek1
- Couvent des pères Franciscains (Monte-Carlo, Monaco)1
- Cristoferus Chrewczer1
- Curt H. Reisinger1
- Cyrus Longworth Lundell1
- D'Assonleville family1
- D. Andreas Parisino1
- D. D. Horatius Bosner1
- D. Justin McCann1
- D. Manning1
- Dame Margery Byrkenhed1
- Dana Hill1
- Daniele Florio1
- David Bickersteth Magee1
- David Laing1
- David Swan1