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.
Metropolitan Opera House (Grand Forks, North Dakota)
The building was designed by prominent Minneapolis architect Warren B. Dunnell in the Richardsonian Romanesque style. 
It went through an extensive renovation/restoration by JLG Architects in 2005 and 2006.