Rocca Costanza (15th century) - Massive castle built by Costanzo I Sforza; it has a square plan with four cylindrical corner towers and a wide dry moat. Later used as prison. Villa Imperiale of Pesaro (c. 1530) - Suburban palace with gardens designed by Girolamo Genga for Duke Francesco Maria Della Rovere and his duchess Eleanora and built from c. 1530 onwards, stands atop the San Bartolo hill.
Girolamo Genga
Duke Francesco Maria Della Rovere