The pentagonal bastion fortifications were built during a major reconstruction of the castle carried out by Stanisław Lubomirski in the mid- 17th century. They consist of earthen ramparts (curtains) framed by a stone wall of the escarpment with bastions protruding to the foreground at the corners to protect both the front and the flanks of the palace. This example of a ‘palazzo in fortezza’ building can also be found in castles in Łańcut, Rzeszów and Ujazd. The castle was to be defended by 80 cannons with cannoneers and ammunition and a garrison of 400 Hungarian mercenaries and 200 dragoons. It reportedly kept three years’ worth of food reserves.