 In 1998, he became, at the age of thirty-four, Minister of Justice in the Government led by Prime Minister Jean-Claude Juncker.He also served as Minister for the Treasury and Budget from 1998 to 2009, and Minister of Finance from 2009 to 2013.In the capacity of Minister for the Treasury and Budget, Frieden was responsible for the successful introduction of the euro as replacement for the Luxembourgish franc.