An 1884 illustration by Carlo Cornaglia of the Milan premiere of Don Carlos. This grand opera, composed by Giuseppe Verdi to a French-language libretto by Joseph Méry and Camille du Locle, is adapted from Friedrich Schiller's dramatic play Don Carlos and tells the conflicts of Carlos, Prince of Asturias (1545–1568). First performed in 1867, the opera exists in numerous versions, the longest of which lasts four hours.Illustration: Carlo Cornaglia; Engraving: Giuseppe Barberis; restoration: Adam Cuerden