Santa Marinella is a municipality located on the Latium coast in the province of Rome. The name of the city derives from the depiction of the Saint inside a private chapel on the Odescalchi estate. In ancient times it was called Castrum Novum by the Romans.
Ancient Neolithic and Bronze Age settlement sites have been found in the Santa Marinella area. From the 9th century B.C., the settlement of Punicum, the settlement of Pyrgi (present-day Santa Severa), a likely Phoenician emporia, and finally the Roman settlement of Castrum Novum appeared in the area.
It is called the Pearl of the Tyrrhenian Sea due to the beauty of its beaches and cliffs, the numerous sites of great historical-archaeological and naturalistic importance and the characteristic historic centre overlooking the sea.
Thanks to its historic station, Santa Marinella is the most convenient seaside resort that can be reached by train from Rome. 
SANTA SEVERA is the only hamlet of Santa Marinella (Rome) and an important seaside tourist centre, known for its medieval castle overlooking the sea.