- 2 Carriage houses
- 193 Carriages
- 495 Carriages & coaches
- 3 Carroll County, Maryland
- 1 Carroll, Charles 1737-1832
- 1 Carroll, John 1735-1815
- 1 Carrolton Hotel
- 3 Carrots
- 4 Carr's Cotton Factory
- 1 Carruth, John G.
- 1 Carsen's Fire Works (Firm)
- 1 Carson, James W. & Culin, Robert S. Victoria Oil Works
- 1 Carter & Scattergood Chemical Works
- 1 Carter, Dinsmore & Co.
- 1 Carter's Factory
- 13 Cartes de visite
- 35 Cartes-de-visite (card photographs)
- 2 Carthusian
- 1 Cartographers
- 7 Cartoons
- 92 Cartoons (Commentary)
- 1 Cartoons (working drawings)
- 5 Carts
- 422 Carts & wagons
- 3 Cartwright, Samuel, 1815-1891
- 1 Caruther's Coach Factory
- 1 Carver File Co. (files, rasps)
- 1 Carver, George Washington, 1864?-1943
- 1 Carving (processes)
- 2 Caryatids
- 6 Cascades (water features)
- 4 Cases, Carrying
- 3 Cashmere
- 1 Casseroles (baking dishes)
- 2 Cast iron
- 1 Casters (Wheels)
- 1 Castillo San Salvador de la Punta
- 4 Castillon-la-Bataille, France
- 124 Castles & palaces
- 3 Castles (fortifications)
