University of Stuttgart
Döcker studied architecture from 1912 to 1918 at the University of Stuttgart, graduating with honors. From 1914 to 1917 he was a volunteer in World War I. In 1921 he passed his Staatsexamen in Stuttgart, and from 1922 to 1924 he was an assistant for Paul Bonatz at the University of Stuttgart, where he received his doctorate, on the architecture of homes.