Castles, palaces and mansions Castello normanno-svevo Work on the construction of the Norman-Swabian castle began in 1042 and ended in 1300. The building played a defensive function and for a long time it was used as a fortification. In 1600, it was purchased by Principi Pignatelli, who transformed it into an elegant dwelling. Today, an archaeological exhibition is set up in its rooms.