Map - Civitavecchia, Italy Civitavecchia is a town and comune of the province of Rome in the central Italian region of Lazio. A sea port on the Tyrrhenian Sea, it is located 80 kilometres west-north-west of Rome, across the Mignone river. The harbour is formed by two piers and a breakwater, on which is a lighthouse. The name Civitavecchia means "ancient town". During World War II, Allied bombings severely damaged Civitavecchia, and caused civilian casualties.