The Ballet du Capitole de Toulouse and Jordi Savall, leading his ensemble Le Concert des Nations, starred on Sunday at the Liceu in the premiere of a show that revives two old ballets by Christoph Willibald Gluck, Semiramis and Don JuanAlthough the original choreographies have been lost, the two works are considered the first ballets in the strict sense of the term, since until then, in the 18th century, dance was merely a form of pantomime accompanying music.