Sicilian Seaport is a term that refers to the four major ports located in Sicily, Italy. Messina is a port city located on the east coast of the island and is the third largest city in Sicily. Palermo is the capital of Sicily and is located on the northwest coast of the island. Aci is a small port town located on the east coast of Sicily, near Catania. Trapani is a port city located on the west coast of Sicily.