Pyrgi was an ancient Etruscan port in Latium, central Italy, to the north-west of Caere. Its location is now occupied by the borough of Santa Severa. Remains of its defensive walls exist in polygonal blocks of limestone and sandstone, neatly jointed. They enclosed a rectangular area some 200 m in width and at least 220 m in length. The south-west extremity has probably been destroyed by the sea. It contained a rich temple of Leucothea, the foundation of which was ascribed to the Pelasgi. It was plundered by Dionysius in 384 BC. Later it became dependent on Caere, though it is not probable that it was originally merely the harbour of Caere; Alsium was c. 8 km (5 mi) to the south.