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.
Adolf Hoch
He was the architect of the Opernpassage in Vienna, a pedestrian underpass of the most busy crossroads of the city near the opera house. It was built in 1955 and opened on 4 November 1955, one day before the reopening of the Vienna State Opera after World War II. Since then it has been a symbol of the modern spirit in architecture and urban planning in Vienna. Cooperating with the Federal Office for the Protection of Monuments in Austria the City of Vienna undertook a complete restoration of the structure, which was reopened on 17 September 2013.