Otto Koloman Wagner (13 July 1841 – 11 April 1918) was an Austro-Hungarian architect and urban planner, known for his lasting impact on the appearance of his home town Vienna, to which he contributed many landmarks. Wagner was born in Penzing, a district in Vienna. He was the son of Suzanne (née von Helffenstorffer-Hueber) and Rudolf Simeon Wagner, a notary to the Royal H...