Lenz was deputy district chairman of the CDU in the district of Cologne. From 1947 to 1950 he was a member of the state parliament in North Rhine-Westphalia, where he represented the constituency of Cologne-Land-South. Lenz was a member of the German Bundestag from its first election in 1949 to 1969. During this period he was always elected directly to parliament in the constituency of Cologne-Land. From 10 February 1953 to 21 January 1970 he was also a member of the
European Parliament. == Literature ==