It’s hard to believe that it’s been 25 years.
Speaking 25 years after the event, Mrs Merkel said the message for those in countries where rights were threatened was that things could get better.
Earlier she attended a service for the former East German regime’s victims.
The Berlin Wall was built in 1961 to stop people fleeing from communist East Germany to the West.
Its fall in 1989 became a powerful symbol of the end of the Cold War.