What is the name of the Austrian architect known for designing the historic building complex in Austria known as The Belvedere?
Johann Lukas von Hildebrandt:  Among his more important works are Palais Schwarzenberg, St. Peter's Church, and Belvedere in Vienna, Savoy Castle in Ráckeve, Schönborn Palace in Göllersdorf, and Schloss Hof.
i don't know