1911 Encyclopædia Britannica/Chaves
CHAVES, a town of northern Portugal, in the district of Villa Real, formerly included in the province of Traz os Montes; 8 m. S. of the Spanish frontier, on the right bank of the river Tamega. Pop. (1900) 6388. Chaves is the ancient Aquae Flaviae, famous for its hot saline springs, which are still in use. A fine Roman bridge of 18 arches spans the Tamega. In the 16th century Chaves contained 20,000 inhabitants; it was long one of the principal frontier fortresses, and in fact derives its present name from the position which makes it the “keys,” or chaves, of the north. One of its churches contains the tomb of Alphonso I. of Portugal (1139–1185). In 1830 the town gave the title of marquess to Pinto da Fonseca, a leader of the Miguelite party.