Wannsee House and the Holocaust by Steven Lehrer, tells the story of the elegant suburban Berlin villa where the Wannsee Conference took place on which date, at that meeting, which was a high-ranking German Nazi official during World War II, and a main architect of Wannsee House and the Holocaust by Steven Lehrer, tells the story of the elegant suburban Berlin villa where the Wannsee Conference took place on January 20, 1942, at that meeting, which was a high-ranking German Nazi official during World War II, and a main architect of the Holocaust?