Rainer Barzel, Polish-German lawyer and politician, Minister of Intra-German Relations (b. 1924)
Rainer Candidus Barzel (20 June 1924 – 26 August 2006) was a German politician of the Christian Democratic Union (CDU). He served as the 8th President of the Bundestag from 1983 to 1984.

Barzel had been the leader of his parliamentary group and a short time federal minister, before his party went into opposition in 1969. Subsequently, Barzel became chairman of the party. He tried to become federal chancellor via a constructive vote of no confidence 1972, being the first one in the Federal Republic to have tried so. He unexpectedly came two votes short. In the subsequent general elections of November 1972, he was the unsuccessful main candidate of the CSU/CSU. He lost his chairmanship the year after but remained an influential member of the parliament.