Panglimbak miwah ngukuhang kawéntenan puniki sampun makilitian antuk sakancan teknologi kastil saking Perang Salib, sakadi benteng konsentris miwah unteng patitis saking sokongan sané wénten sadurungnyané, sakadi Benteng Romawi.
These changes in defence have been attributed to a mixture of castle technology from the Crusades, such as concentric fortification, and inspiration from earlier defences, such as Roman forts.