Vienna State Opera
The opera house was the first major building on the Vienna Ringstrasse commissioned by the Viennese "city expansion fund". Work commenced on the house in 1861 and was completed in 1869, following plans drawn up by architects August Sicard von Sicardsburg and Eduard van der Nüll. It was built in the Neo-Renaissance style by the renowned Czech architect and contractor Josef Hlávka.
Opernhaus Düsseldorf
The original opera house was constructed between 1873 and 1875 as the municipal theatre, designed by Ernst Giese (1832-1903). y its inauguration day, 29 November 1875, it was only partially completed due to cost overruns, but it continued to the operated by the city authorities. By 1891 an electric lighting system had been installed.