The Castle of Ripoli, which was the last defence bastion of the Pisa's Republic against Florence, is located in the municipality of Cascina on the outskirts of Pisa not far from the Badia di San Savino. It dates back to the second half of the fourteenth century and has the typical structure of the villas or fortified farms, similar to the fortifications of Cascina . The square castle was set up with four square corner towers . When built , the castle incorporates an older square tower, made of brick .
The towers, now severed, emerged the height of the limestone walls . His remains, badly preserved, are unfortunately abandoned by the bodies responsible for its protection, so that the original main entrance is now reduced to rubble and is barely visible among the huts fate behind the walls. Inside the walls of the houses were built with the use of materials originating fruit of total demolition of the fortifications of the south side of the manor. Conquered by the Florentines in 1406 opened the doors of the city of Pisa that capitulated shortly after.