German Chancellor Angela Merkel made a speech on site to mark the 70th anniversary of the liberation of the Dachau concentration camp.
Merkel appeals to people worldwide to remember the history of the holocaust.
"It is the responsibility of our country and its citizens. The country and its citizens should always keep this responsibility in mind. We owe this to all the victims of Nazis, including those who died at Dachau, we owe this to all the survivors. We owe this to them forever."
Merkel has thanked survivors for their role as witnesses to the atrocities.
The attendance of the event includes survivors and their relatives from about 20 countries, U.S. veterans, and thousands of guests from all over the world.
Dachau concentration camp was set up in 1933 as the first Nazi concentration camp in Germany.
More than 200,000 people from around Europe were imprisoned at Dachau in the 12 years of its existence from 1933 to 1945.
Over 41,000 prisoners died in the camp.
It is now being transformed into a memorial site.
