In 1929, Hitler moved into a luxury eight-room apartment at Prinzregentenplatz 16.[3] The apartment was on the second floor (according to the European convention, the third floor by the American convention) and included two kitchens and two bathrooms. His publisher initially paid for it; a decade later, Hitler paid for it outright.[2] Eventually, the whole building became the property of the Nazi Party
In 1935 the apartment was renovated by designer Gerdy Troost, widow of architect Paul Ludwig Troost, a member of the Nazi Party and architectural advisor of Hitler.[4] Hitler filled the apartment with works of art he had collected, particularly nineteenth-century German paintings as well as German Old Masters.[5]
In 1925, Hitler brought his widowed half-sister Angela Raubal from Austria to serve as housekeeper for both his Munich apartment and his rented villa The Berghof. She brought along her two daughters, Geli and Friedl. Hitler became very close to his niece Geli Raubal, and she moved into his apartment in 1929, when she was 20. Their relationship is shrouded in mystery but was widely rumored to be romantic. On September 18, 1931, she died of a gunshot wound in the apartment; the coroner proclaimed her death a suicide. Hitler was on his way to Erlangen to give a speech, but he returned immediately to Munich on hearing the news.[6] He took her death very hard and went into a depression. He mourned her for years, maintaining her rooms exactly as they had been.[7]
Hitler continued to live in the apartment until 1934, when he became Führer und Reichskanzler of Germany. After that, Hitler kept the apartment, but spent most of his time either in Berlin or in his Berghof residence.
Hitler sometimes used the Munich apartment for high-level diplomatic meetings. On September 25, 1937, he met there with Benito Mussolini when he was trying to get Mussolini to agree to his plan to annex Austria to Germany;[8] the leaders agreed to a strengthening of their Axis pact. He also met with British Prime Minister Neville Chamberlain in the apartment[9] on September 30, 1938, following the signing of the four-power Munich Accords.[2]
Source: https://en.wikipedia.org/wiki/Adolf_Hitler%27s_Munich_apartment