- Cathédrale Saint-Etienne (Toul, France)1
- Cecco, d'Ascoli, 1269-13271
- Chiesa di Sant'Antonio da Padova (Palermo, Italy)1
- Christian heretics1
- Ciphers1
- City planning1
- Classical period, 1500-17001
- Clement VIII, Pope, 1536-16051
- Clothing and dress1
- Coats of arms1
- Codaro, Abramo1
- Commentaries1
- Commercial law1
- Concini family1
- Concini, Alessandra Antinori1
- Concini, Arrigo1
- Concini, Giovanbattista1
- Cortesi, Girolamo1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231