Seville is famous as the setting for at least three great classical operas: Mozart's Marriage of Figaro, Rossini's Barber of Seville, and Bizet's Carmen. (Mozart's Don Giovanni is not explicitly set there, though other tellings of the Don Juan legend are. Lesser operas also set in Seville include Thomas Linley's The Duenna, remembered today mainly because Sheridan wrote the libretto). Only Carmen, however, refers to specific places in Seville; it begins outside the tobacco factory, and the building still exists, though it now houses part of the administration of Seville University.
The opera ends outside the bullring, which also still stands and is still used as a bullring:
The Alcázar is a royal palace, consisting of buildings and gardens constructed over a very long period, but mostly between about 1400 and 1600. Even after the expulsion of the Moors from Spain, their artistic influence continued in the palace buildings.