- Clare, of Assisi, Saint, 1194-12531
- Clement VIII, Pope, 1536-16051
- Clergy1
- Clothing and dress1
- Codaro, Abramo1
- Coen, Caim, active 17th century1
- Colleoni, Bartolomeo, 1400-14751
- Concini, Alessandra Antinori1
- Concini, Arrigo1
- Concini, Bernardo1
- Concini, Lucrezia1
- Confession1
- Confession--Catholic Church1
- Confraternities1
- Construction industry1
- Controversial literature1
- Corsini, Bartolomeo1
- Cortesi, Girolamo1
- Cosimo II, Grand Duke of Tuscany, 1590-16211
- Cosimo III, Grand-Duke of Tuscany, 1642-17231