Hans-Dietrich Genscher (21 March 1927 – 31 March 2016) was a German statesman and a member of the liberal Free Democratic Party (FDP), who served as Minister of the Interior from 1969 to 1974, and as Foreign Minister and Vice Chancellor from 1974 to 1992 (except for a two-week break in 1982), making him the longest-serving occupant of either post. In 1991 he was chairman of the Organization for Security and Co-operation in Europe (OSCE).