Castles, palaces and mansions Castello This castle was built in 1385 to defend the city from the attacks of the Perugians. It was built by the feudal lord Cambio who connected the pre-existing gentilizia towers with a city wall. The castle then became a four-sided fortification of considerable strategic importance. Around the castle, the village of Palazzo flourished until the struggles between Perugia and Assisi lasted.