Sant'Alessio Siculo is a comune in the Metropolitan City of Messina in the Italian region Sicily, located about 180 kilometres east of Palermo an…Sant'Alessio Siculo is a comune in the Metropolitan City of Messina in the Italian region Sicily, located about 180 kilometres east of Palermo and about 35 kilometres southwest of Messina. Its main attraction is a castle built in the 11th century by the Byzantine emperor Alexios I Comnenos in his war against the Normans and the Arabs, who also held it. It sits on the promontory Capo Sant'Alessio overlooking the sea and beach.