- Calvin, John, theologian, 1
- Camilla the Skinny, prostitute, 1, 2, 3
- Campestri, Ruoti da, Mugello Valley resident, 1
- Cappello, Andrea, 1, 2
- Cappello, Bianca, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, plate 12
- Cappello, Venetian family, 1
- Cappello, Vittorio, 1, 2
- Capponi, Florentine family, 1, 2, 3, 4, 5, 6
- Capponi, Gian Battista, 1, 2, 3
- Capponi, Lisabetta, 1
- Capponi, Piero, 1
- Capri, Michele, poet, 1
- Carafa, Neapolitan family, 1
- Carlo, Vicenzo di, gold thread weaver, 1
- Caroso, Fabritio, Medici dancing master, 1
- Casimir, Johann, German Calvinist noble, 1
- Castiglione, Baldessar: The Courtier, 1
- Casulana, Maddalena, composer, 1, 2
- Catasta, Giovanni, hanged rebel, 1
- Caterina, laundress, 1
- Catherine of Aragon, 1
- Cauriano, Filippo, Medici doctor, 1
- Cavalcanti family, Florentine merchants, 1
- Ceccharelli, Carlo, Medici groom, 1
- Cegia, Soldo del, furrier, 1
- Cellini, Benvenuto, sculptor, 1, 2, 3, 4, 5;
- Cepparello, Gianozzo, Medici servant, 1, 2
- Certosa, Abbey of, 1
- Cerveteri, 1
- Charles IX, King of France, 1, 2
- Charles V, Holy Roman Emperor, 1, 2, 3, 4, 5, 6, 7, 8
- Chenonçeau, 1
- Cibò, Caterina, Queen of Cyprus, 1
- Cibò, Eleonora, Marchesa of Cetona, 1, 2
- Cicero, 1
- Cino, Berto, slipper maker, 1
- Civitavecchia, 1
- Clayton, Sir Richard, English traveller, 1
- Clement VII, Pope, (Giulio de’ Medici), 1, 2, 3, 4
- codpiece, 1
- Colonna, Marcantonio, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
- Colonna, Pompeo, 1
- Colonna, Roman family, 1, 2
- Commedia dell’Arte (Commedia di Zanni), 1
- Concino, Bartolomeo, Medici secretary, 1, 2
- Condé, Prince of, French noble, 1
- Conegrano, Ridolfo, Ferrarese ambassador, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33
- Constantine XI, Byzantine Emperor, 1
- Constantinople, 1
- Corbolo, ‘Secretary of the Eight’, 1
- Corfu, 1, 2
- Corteccia, Francesco, Medici musician, 1, 2
- Cortesi, Andrea, merchant, 1
- Cortile, Ercole, Ferrarese ambassador, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
- Cossetti, Gian Battista, money lender, 1
- Counter-Reformation and Council of Trent, 1, 2, 3, 4
- Crete, 1
- Crimes of honour, 1
- Cyprus, 1, 2