- Colombia--Cartagena1
- Colombino, Giorgio di1
- Compasses (Mathematical instruments)1
- Complaint letters1
- Concini family1
- Concini, Alessandra Antinori1
- Concini, Arrigo1
- Concini, Giovanbattista1
- Confiscations1
- Conspiracy1
- Conspiracy of Catiline (Rome : 65-62 B.C.)1
- Construction industry1
- Contracts1
- Contro, Mochata di1
- Controversial literature1
- Contucci, Jacopo1
- Convento di S. Maria degli Angeli (Florence, Italy)1
- Convento di Santa Giulia (Lucca, Italy)1
- Cook family1
- Cook, John, -approximately 13681