Castellammare del Golfo (Casteddammari in sicilian) is a town in the Trapani Province of Sicily. The name is roughly translated "Sea Fortress of the Gulf." It is so named because of the medieval fortress in the harbor. The body of water it sits upon also takes its name from the fortress, Golfo di Castellammare.
The town is noted, however, for having been the birthplace of many American Mafia figures, including Salvatore Maranzano, Joseph Ristuccia, Michael Monte and Joseph Bonanno. Also Sylvester Stallone's father Frank Stallone Sr. was originally from Castellammare del Golfo.