Georg Michaelis was Chancellor of Germany for a few months in 1917. He was the first nonnoble to hold the office.
Michaelis, born in Haynau in the Prussian Province of Silesia, grew up in Frankfurt . He studied jurisprudence at the University of Breslau, the University of Leipzig and the University of Wrzburg from 1876 to 1884, becoming a Doctor of Laws.
Source: Wikipedia