Production place
- Ceos, Cyclades Islands1 objects
- Cerro Sechin, Ancash Region, Northern Peru22 objects
- Cerro de las Monjas, Marcahuamachuco, Northern Peru11 objects
- Cerro de los Corrales, Marcahuamachuco, Northern Peru1 objects
- Chichén Itzá, Yucatán, Mexico4 objects
- Chiconcuac de Juárez, State of Mexico, Mexico1 objects
- Chicopee Falls, Hampden County, Massachusetts1 objects
- Chigmecatitlán, Puebla, Mexico1 objects
- China6 objects
- Chios Island, Aegean Islands, Greece2 objects
- Civita Lavinia (ancient name), Lazio, Central Italy1 objects
- Cleitor, Arcadia, Peloponnese1 objects
- Cobridge, Stoke-on-Trent, Staffordshire, England9 objects
- Cologne, North Rhine-Westphalia, Germany3 objects
- Colorado2 objects
- Columbia River, Oregon and Washington1 objects
- Columbus, Franklin County, Ohio1 objects
- Commagene (ancient kingdom), Southeast Anatolia, Turkey1 objects
- Constantinople (ancient city)51 objects
- Corduba (ancient place), Hispania Ulterior8 objects