Edificata dagli Etruschi
Inserita nella cinta muraria di Volterra
The Volterra ring walls has two ancient gates, the Porta all’Arco and the Porta Diana (or Portone), both important examples of Etruscan architecture. Outside the fortification are the Necropolises of the Main Gate, Badia, Ulimeto and Ripaie, which have been under excavation since the 18th century.
Recently, next to Porta Diana, a gate of the Etruscan walls, ruins of a Roman amphitheatre were discovered, which according to Discovery News’ top ve is to be considered as one of the most promising archaeological sites worldwide.