Radio Free Europe is a radio station that produces radio programmes in 28 Eastern European, Middle Eastern and Central Asian languages and broadcasts these programmes mainly on shortwave. During the Cold War in particular, it was a propaganda tool to provide listeners in socialist countries with news from Western countries. In 2015, the ZZF received 130 folders of documents from the years 1969 to 1989 as a donation. Divided into 35 series, this valuable collection of sources contains background and situation reports as well as press summaries from the socialist countries.