Volterra, town (1991 pop. 12,879), Tuscany, central Italy. A powerful Etruscan town, it later (12th–13th cent.) was a free commune and passed to Florence in the 14th cent. Of note are well-preserved Etruscan gates and tombs, medieval walls, a Romanesque cathedral, and the Palazzo dei Priori (13th cent.). The powerful fortress (built 14th–15th cent.) is now a prison. There is an Etruscan museum in the town.
"Volterra." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (March 17, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/volterra
"Volterra." The Columbia Encyclopedia, 6th ed.. . Retrieved March 17, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/volterra