VOLTERRA (anc. Volaterrae), a town and episcopal see of Tuscany, Italy, in the province of Pisa, from which it is 51 m.
Volaterrae (Etruscan Velathri) was one of the most powerful of the twelve confederate cities of Etruria.
During the war between Marius and Sulla it withstood the latter's troops for two years in 82-80 B.C. As a result of its resistance Sulla carried a law for the confiscation of the land of those inhabitants of Volaterrae who had had the privileges of Roman citizenship. This, however, does not seem to have been carried out until Caesar as dictator divided some of the territory of Volaterrae among his veterans.
Among its noble families the chief was that of the Caecinae, who took their, name from the river which runs close to Volaterrae and still retains the name Cecina.