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.
Royal Opera House, Valletta
The design of the building was entrusted to Edward Middleton Barry, the architect of Covent Garden Theatre, and the classic design plan was completed by 1861. The original plans had to be altered because the sloping streets on the sides of the theatre had not been taken into consideration. This resulted in a terrace being added on the side of Strada Reale (nowadays Republic Street) designed by Maltese architects.