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.
Carltheater
It was the successor to the Leopoldstädter Theater. After a series of financial difficulties, that theater had been sold in 1838 to the director, Carl Carl, who continued to run it in parallel to his Theater an der Wien until 1845. Two years later, the building was partially demolished and rebuilt following the plans of architects August Sicard von Sicardsburg and Eduard van der Nüll, who would later design the Vienna State Opera.