Austria has dabbled in a number of what have revealed themselves to be rather unsavory political systems (national socialism and fascism, for instance) before settling (fingers crossed!) on a federal parliamentary democracy model in the aftermath of WWII and the Allied occupation that lasted until 1955.
Stamp details: Top left: Issued on: June 1, 1850 From: Vienna, Austrian Empire MC #1
Top right: Issued on: June 1, 1867 From: Vienna, Austro-Hungarian Empire MC #35
Second row left: Issued in: 1919 From: Vienna, Republic of German-Austria MC #255
Second row middle: Issued in: 1922 From: Vienna, Republic of Austria MC #360
Second row right: Issued on: August 16, 1935 From: Vienna, Federal State of Austria MC #607
Third row: Issued on: September 16, 1946 From: Vienna, Allied-Occupied Austria MC #783
Bottom left: Issued on: May 15, 1955 From: Vienna, Republic of Austria MC #1017
Bottom right: Issued on: March 3, 2018 From: Vienna, Republic of Austria MC #3385
Recognized as a sovereign state by the UN: Yes (since December 14, 1955) Official name: Republic of Austria; Republik Österreich Member of the Universal Postal Union: Yes (since July 1, 1875)
