Rudolf Prikryl (21 March 1896 – 13 June 1965) was the provisionally-instated mayor of Vienna from 13 April to 16 April 1945, and is remembered as the "three days' mayor" (German: Drei-Tage-Bürgermeister). Prikryl was born in Vienna, grew up in Alsergrund, and became a plumber's assistant. He served in the First World War, and married for the first time, getting divorced soon after. In the 1930s, he left his second wife and their two children and travelled to France, continuing on to Spain in 1938. He fought in the International Brigade in the Spanish Civil War against the Nationalists, and was