a city of Portugal, and capital of a duchy of the same name. It is seated on an eminence, by a brook called Farvenca; and is divided into two parts, the old city and the town. The former is upon an eminence, and fortified with a double wall. That part next the town has five battions, but no ditch; the citadel is on the opposite side joined to the wall. The town is in a plain, and defended by a fort with four bastions. It is seated near the river Sabon, on the frontiers of Galicia, in W. Long. 6° 15'. N. Lat. 41° 27'.