Parentless Concepts
- Clavius, Christophorus
- Clement of Alexandria
- Clessalius
- Climacus, Johannes
- Clusius, Carolus
- Clüver, Philipp
- Coccius, Jodocus
- Cocz, Peter
- Codex Arabicus bibliothecae Palatinae continens Epistolas S. Pauli Catholicas et Acta Apostolorum
- Colerus, Christophorus
- Colerus, Matthias
- collection
- Collenuccio, Pandolfo
- Colloquium inter Turcam et Christianum
- collotype
- Cologne
- color film
- color photography
- Comburg
- comedy
- conference object
- Confessio germanica
- Conopeus, Paulus
- Conovitz
- Conradus Gaasch de Cachin