- 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)
- 2 Castor (genus)
- 52 Castor Avenue
- 1 Castor's Coach and Carriage Factory
- 1 Castor's Saw Mill
- 5 Casts (Sculpture)
- 1 Casualties
- 1 Catalog cards
- 1 Catalog Dept.
- 1 Cataracts
- 1 Catasauqua, Pennsylvania
- 1 Catchwords
- 2 Catechisms
- 1 Caterina Cornaro, Queen of Cyprus, 1454-1510
- 6 Caterpillars
- 1 Catfish
- 7 Catharine Street
- 1 Catharine Street
- 46 Cathedral Basilica of SS. Peter and Paul
