The Castello Normanno-Svevo or Norman-Swabian Castle (Italian: Castello normanno-svevo), also known as the u Castídde in the Barese dialect, is a castle in the Apulian city of Bari, Italy.

After Bona's death, it was returned under the King of Naples and transformed into a prison and barracks.

According to the tradition, in 1221 Frederick II met St. Francis of Assisi in this castle.

According to tradition, Frederick had a courtesan sent to Francis's room and watched through a peephole to see what would happen.

When Francis sent the woman away, Frederick was impressed with his principles; the two spent the rest of the night in conversation.