ZDF, short for Zweites Deutsches Fernsehen, is a German public-service television broadcaster based in Mainz, Rhineland-Palatinate. Launched on 1 April 1963, it is run as an independent nonprofit institution, and was founded by all federal states of Germany. ZDF is financed by television licence fees and advertising revenues.

Mainz is the capital and largest city of the German state of Rhineland-Palatinate, and with around 221,000 inhabitants, it is Germany's 35th-largest city. It lies in the Rhine-Main Metropolitan Region—Germany's second-largest metropolitan region after Rhine-Ruhr—which also encompasses the cities of Frankfurt am Main, Wiesbaden, Darmstadt, Offenbach am Main, and Hanau.