Avilés, city, Asturias provincia (province) and comunidad autónoma (autonomous community), northwestern Spain. It lies along the Ría (inlet) de Avilés, an inlet of the Bay of Biscay. Avilés is rich in medieval architecture, its outstanding examples including the Gothic churches of San Nicolás and San Francisco. The Church of San Tomás contains the tomb of Pedro Menéndez de Avilés, founder of St. Augustine, Fla. The Fuero de Avilés (1155), a statute by which Alfonso VII of Castile freed the city from its feudal ties, was significant in the development of medieval Spanish law. The city has an iron and steel industry, and it exports coal from Asturias’s mines. Swimming beaches and a fishing fleet are at nearby Salinas. Pop. (2007 est.) mun., 83,320.