Name
- Medici, Family3
- Wellcome Foundation, London3
- Cosimo I, Grand Duke of Tuscany2
- Francis I, of Tuscany2
- Henry IV, of France2
- See of Florence, Italy2
- Acevedo y Zuñiga, Manuel, Conde de Monterey, Spanish Ambassador in Rome1
- Angèli, Pietro, da Barga; author1
- Bargagli, Scipione, Italian author, 1540-16121
- Cambiagi, Gaetano1
- Cano, Melchor, theologian and bishop, c 1509-15601
- Cesi, Pietro Donato, Cardinal1
- Chanut, Pierre, French diplomalist1
- Christie, Manson & Woods, auctioneers1
- Cintoletta, Curtius, Canon1
- Clement VIII, Pope1
- Comines, Philippe, alias Commines; French historian1
- Commendone, Giovanni Francesco, Bishop of Zante, Cardinal 15631
- Concini, Cosimo, Tuscan Ambassador to France1
- Conrad III, Emperor of Germany1