Background
Weichmann was born in Landsberg, Upper Silesia, then part of the German Reich, to a Jewish family of physicians.
Weichmann was born in Landsberg, Upper Silesia, then part of the German Reich, to a Jewish family of physicians.
After the war Weichmann studied law at the Silesian Friedrich Wilhelm University, Breslau, and graduated (Doctor iur) in 1922.
In his position as mayor of Hamburg, he served as President of the Bundesrat (1968–1969). In 1914 he began to study medicine, but volunteered at the outbreak of the First World War in 1914. After the takeover of power (1933) by the Nazi Party Weichmann fled first to Czechoslovakia, then to France—with a short term of imprisonment (1939–1940)—Spain, Portugal and later the United States.
In 1948 he returned to Germany at the invitation of the mayor of Hamburg, Max Brauer, and started his political career there.
Weichmann died in Hamburg and is buried at Ohlsdorf Cemetery. Weichmann"s son lives in Canada.
Weichmann started his political career on a soldiers" council (German: Soldatenrat) in 1918. From 1948 until 1957, he was President of the Hamburg Court of Auditors.
In 1957, he was appointed as Senator of Finance, a position he held until his election as First Mayor of Hamburg on 16 June 1965.
Weichmann resigned in 1971. He was considered a potential candidate to be the next President of Germany, but he did not put himself forward.
In 1956 he became a member of the faculty of the University of Hamburg. In 1920, he became a member of the Social Democratic Party of Germany.