Question: What is the name of the Austrian architect known for designing the historic building complex in Austria known as The Belvedere?
Sentence (from "Béthanie (Hong Kong)"): Béthanie () is a historic building complex located in Pok Fu Lam, in Hong Kong built in 1875 as a sanatorium by the Paris Foreign Missions Society (French: "Missions Étrangères de Paris" ).
Relevant evidence: No