Zweites Deutsches Fernsehen (English: "Second German Television"), ZDF, is a public-service German television channel based in Mainz. It is run as an independent non-profit agency established by joint contract between the German federal states (Bundesländer). ZDF is funded by a television licence and advertising revenue.
The station began broadcasting on 1 April 1963 from Eschborn. The channel broadcast its first program in colour in 1967. In 1974 ZDF moved its base of operations to Mainz-Lerchenberg, after briefly being located in Wiesbaden.