 Complete the following phrase:  In 1945, during the last months of World War II, the building was largely destroyed again, this time by the bombing of Dresden and subsequent firestorm, leaving only the exterior shell standing. Exactly 40 years later, on 13 February 1985, the operas reconstruction was completed. It was rebuilt to be almost identical to its appearance before the war, but with the benefit of new stage machinery and an accompanying modern rear service building. The Semperoper reopened with the opera that was performed just before the buildings destruction in 1945, Carl Maria von Webers Der Freischütz. When the 