On Jan. 30, 1933, Hitler was appointed chancellor of Germany, a move that eventually led to the Holocaust that left millions of people dead and plunged the world into war for the second time in 20 years.
Chancellor Angela Merkel provided the keynote address to open an exhibit at the documentation center Topography of Terror, one of the most-visited, Nazi-era memorial sites, the British newspaper The Daily Telegraph said. It is on the grounds of the former SS headquarters in Berlin.
Merkel also took part in a special parliamentary session to remember victims of Hitler's National Socialism.
Elsewhere in Berlin there was an open-air exhibition highlighting the biographies of 200 Germans who were persecuted by the Nazis.