Promotional flyer for Les Sept Chateaux de Diable, (The Seven Castles of the Devil) performed at the Theatre de Chatalet, Paris The Th??tre Imp?rial du Ch?telet opened its doors for the very first time on 19 August 1862, in the presence of the Empress Eug?nie. The honour of inaugurating such a prestigious occasion went to ?Rothomago?, a fantasy play written by d'Ennery, Clairville and Monnier. Seating 2,500 and boasting a stage of 24 x 35 meters, it was the largest venue of its type in Paris at the time. It was an exceptional piece of work noted for its exceptional sound qualities, achieved by using floor parquet, wood-framed seating, and a dome glass roof for optimum sound reflection.