After completing his
Abitur, Arndt studied law at the
Goethe University Frankfurt. In 1952, he passed his first state examination, followed in 1960 by his second state examination. From 1953 he worked as an advisor for youth law and the federal youth plan in the Hesse Ministry of the Interior. Arndt joined the
SDP in 1945. Between 1948 and 1954, he was chairman of the
Socialist Youth. In 1952 Arndt became a
city councillor in
Frankfurt, a position he held until 1956, when he was elected to the
Landtag of Hesse. Arndt remained in the Landtag until 1972. Arndt became the Economy and Transport Minister for Hesse in 1964, after the resignation of his predecessor Wilhelm Conrad.After the resignation of
Georg August Zinn as
Minister President in 1969, Arndt was considered as his successor, but the role ultimately went to
Albert Osswald. In Osswald's new cabinet of 1970, Arndt became the Minister of Finance for Hesse. were deeply controversial. On 16 December 1971 Arndt was elected mayor of Frankfurt, following the death of incumbent Walter Möller. He started his term as mayor in 1972. Arndt earned the popular nickname
Dynamit-Rudi ("
Dynamite Rudi") for his enthusiasm for demolishing the remaining World War II ruins – in particular, his failed campaign to demolish the
Alte Oper opera house. In the local elections of March 1977, the
CDU won a landslide victory. As a result, CDU politician
Walter Wallmann became the new Mayor of Frankfurt and Arndt became the opposition leader in the Hessen Landtag. In his later years, Arndt worked as a lawyer. After
German reunification in 1990, he volunteered for the SPD in
Thuringia. He died unexpectedly during a river trip near Kyiv in 2004. Arndt is buried in the
Frankfurt Main Cemetery. == References ==