 In 1805, Ludwig van Beethoven premiered his opera "Fidelio" about a Sevillian prison which held prisoners of conscience in the late-18th century.While he didn't specifically name it in the text, it is very likely that the composer meant the castle of San Jorge.In recent years, Seville has attempted to monetize its operatic past with an inititave called Sevilla Ciudad de Ópera (Spanish for "Seville City of Opera").