Chaves is a city and a municipality (called "concelho" in Portuguese) in Portugal, located in the district of Vila Real. Aquae Flaviae is the ancient Roman name for this city.
The town has always had great historical importance, being the site of an important Roman garrison and later being in the forefront of resistance during the Napoleonic invasions of the early nineteenth century. In Portuguese military history Chaves is especially famous for two battles: the siege of Chaves by French forces in 1807 and the Royalist attack on Chaves led by Henrique Paiva Couceiro in 1912.
Chaves is a town of fortifications. There is the keep of a medieval castle and ruins of two forts, Forte São Francisco and Forte São Neutel, both built in the 17th century. The original Roman bridge in Chaves crossing the Tamega still stands with its stone arches and is the most important tourist site of the town. The hot springs of Chaves have been famous since Roman times and today many people come to the town to take the water cure.