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: Johann Lukas von Hildebrandt (14 November 1668 – 16 November 1745) was an Austrian baroque architect and military engineer who designed stately buildings and churches and whose work had a profound influence on the architecture of the Habsburg Empire in the eighteenth century. 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. Belvedere, Vienna: The Belvedere is a historic building complex in Vienna, Austria, consisting of two Baroque palaces (the Upper and Lower Belvedere), the Orangery, and the Palace Stables.
Johann Lukas von Hildebrandt