King Frederick II of Prussia shortly after his accession to the throne commissioned the original building on the site. Construction work began in July 1741 with what was designed by Georg Wenzeslaus von Knobelsdorff to be the first part of a "Forum Fredericianum" on present-day Bebelplatz. Although not entirely completed, the Court Opera ("Hofoper") was inaugurated with a performance of Carl Heinrich Graun's "Cesare e Cleopatra" on December 7, 1742. This event marked the beginning of the successful, 250-year co-operation between the Staatsoper and the Staatskapelle Berlin, the state orchestra, whose roots trace back to the 16th century.