Betanzos is a municipality in the autonomous community of Galicia in northwestern Spain in the province of A Coruña. It belongs to the comarca of Betanzos. In Roman times Betanzos was called Flauvium Brigantium or Brigantium. During the Medieval period the settlement was known as Carunio. The town is located in a fertile valley close to the Atlantic Ocean, and it has one of the best preserved old quarters in Galicia.