The original opera house in Frankfurt is now the Alte Oper , a concert hall and former opera house in Frankfurt am Main, Germany. It was inaugurated in 1880 but destroyed by bombs in 1944. It was rebuilt, slowly, in the 1970s, opening again in 1981. Many important operas were performed for the first time in Frankfurt, including Carl Orff’s Carmina Burana in 1937. The square in front of the building is known as Opernplatz . The Alte Oper is located in the inner city district, Innenstadt, within the banking district Bankenviertel. The Oper Frankfurt now plays in the Opern- und Schauspielhaus Frankfurt, completed in 1951, which it shares with the Schauspiel Frankfurt theatre company.

More details: https://en.wikipedia.org/wiki/Alte_Oper