Notable architects involved in the project included the Florentine Filarete, who was commissioned to build the high central entrance tower, and the military specialist Bartolomeo Gadio.
Istaknuti arhitekti koji su sudjelovali u projektu uključuju firentinca Filaretea, kojemu je naručena gradnja visokog središnjeg tornja, i vojnog stručnjaka Bartolomea Gadia.