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hr1 is the successor of Radio Frankfurt, a radio program run by the American occupation government after World War II. After a formal law was issued, the radio station was transferred to the civil government on 28 January 1949.
Until 2004, hr1 was mainly an information program with news and stories. It was then turned into a general radio station playing music from the 1960s to the 1980s and aiming at an older audience. This program change was met with harsh criticism and caused the number of listeners to drop sharply. Most of the information programs were moved to other radio stations, including hr2 and hr-info.