Joachim Wilhelm Gauck OMRI K.U.O.M. GCB RSerafO (German: ; born 24 January 1940) is a German politician and civil rights activist who served as President of Germany from 2012 to 2017. A former Lutheran pastor, he came to prominence as an anti-communist civil rights activist in East Germany.
During the Peaceful Revolution in 1989, he was a co-founder of the New Forum opposition movement in East Germany, which contributed to the downfall of the Socialist Unity Party of Germany (SED) and later with two other movements formed the electoral list Alliance 90. In 1990 he was a member of the only freely elected East German People's Chamber in the Alliance 90/The Greens faction. Following German reunification, he was elected as a member of the Bundestag by the People's Chamber in 1990 but resigned after a single day having been chosen by the Bundestag to be the first Federal Commissioner for the Stasi Records, serving from 1990 to 2000. He earned recognition in this position as a "Stasi hunter" and "tireless pro-democracy advocate", exposing the crimes of the communist secret police.