Gravisca
Encyclopedia
Gravisca or Graviscae was the port of the Etruscan
Etruscan civilization
Etruscan civilization is the modern English name given to a civilization of ancient Italy in the area corresponding roughly to Tuscany. The ancient Romans called its creators the Tusci or Etrusci...

 city of Tarquinii, situated 8 km east of the city center.

A colonia of Roman citizenship was established at the site in 181 BC.
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