Elvas is a Portuguese municipality, an episcopal city and frontier fortress of Portugal, located in the district of Portalegre in Alentejo. It is situated about 230 km east of Lisbon, and about 15 km west of the Spanish fortress of Badajoz, by the Madrid-Badajoz-Lisbon railway. The city itself has a population of 18,106. Elvas is among the finest World examples of intensive usage of the trace italienne in military architecture, and is a World Heritage Site since June 30th 2012. The inscribed site name is "Garrison Border Town of Elvas and its Fortifications".
Elvas lies on a hill 8 km northwest of the river Guadiana. It is defended by seven bastions and the two forts of Santa Luzia and Nossa Senhora da Graça. Its late Gothic cathedral, which has also many traces of Moorish influence in its architecture, dates from the reign of Manuel I of Portugal (1495-1521). A 6 km long aqueduct supplies the city with pure water; it was begun early in the 15th century and completed in 1622. For some distance it includes four tiers of superimposed arches, with a total height of 40 m. The surrounding lowlands are very fertile, and Elvas is known for its olives and plums, the last-named being exported, either fresh or dried, in large quantities. Brandy is distilled and pottery manufactured in the city.