- 1 Capital (economic concept)
- 6 Capitals (Architecture)
- 5 Capitol Hill
- 2 Capitol Street
- 17 Capitols
- 4 Capricci di varie Figure di Iacopo Callot
- 4 Capricorn symbols
- 1 Caprimulgiformes (order)
- 1 Captain Bogardus, the champion (Work of Art)
- 3 Captains (military officers)
- 1 Caravaggio, Polidoro da, ca. 1497-ca. 1543
- 2 Carbon County, Pennsylvania
- 3 Carbonated beverages
- 2 Carbonization
- 1 Carborundum (TM)
- 6 Carborundum prints
- 2 Card Catalog Room
- 2 Card catalogs
- 1 Card games (game sets)
- 1 Cardale, John Bate, 1802 - 1877
- 2 Cardenas, Mexico
- 5 Cardinals
- 3 Cardinals (bird)
- 2 Carding
- 1 Cardington Mill
- 4 Cards
- 48 cargo containers
- 52 Cargo ships
- 22 Caricatures
- 1 Carl Franke (Firm)
- 5 Carlisle Street
- 1 Carlisle, George William Frederick Howard, 7th Earl of, 1802-1864
- 1 Carlisle, Pennsylvania
- 1 Carlsbad, California
- 1 Carlstadt, New Jersey
- 4 Carlton House (New York, N.Y.)
- 2 Carlyle, Thomas, 1795-1881
- 1 Carmagnole
- 198 Carnegie libraries (institutions)
- 200 Carnegie, Andrew
