Jacques Santer (born 18 May 1937 in Wasserbillig) is a Luxembourg politician.He was finance minister of Luxembourg from 1979 until 1989, and the 22nd Prime Minister of Luxembourg from 1984 to 1995, as a member of the Christian Social People's Party, which has been the leading party in the Luxembourg government since 1979. As Prime Minister of Luxembourg he also led the negotiations on the Single European Act, which effectively set aside the 20-year-old Luxembourg Compromise.