Original: The reconstruction of the building was supervised by architect Carl Ferdinand Langhans, and the KÃ nigliches Opernhaus (Royal Opera House) was inaugurated the following autumn by a performance of Meyerbeer's Ein Feldlager in Schlesien.
Simplified: It was called KÃ nigliches Opernhaus (Royal Opera House), and it opened with a performance of Meyerbeer's Ein Feldlager in Schlesien.