Berlin Wall Tourist attraction in Berlin, Germany

Reference:Herraotic / CC-BY-SA-3.0
Reference:Roehrensee / CC BY-SA 4.0
Map gps coordinates: 52.516111, 13.376944
Address: Ebertstra├če 21, 10117 Berlin, Germany

On 9 November, 1989 people in East Germany (the German Democratic Republic, GDR) were suddenly allowed to cross through the Berlin Wall into West Berlin, following a peaceful protest against the country's dictatorial administration, including a demonstration by some one million people in East Berlin on 4 November. Unlike earlier riots which were ended by military force with the help of the USSR, Gorbachev now decided not to interfere with the process in Germany. He stated that German reunification was an internal German matter.

Source: Wikipedia

Nikita Khrushchev authorized East German leader Walter Ulbricht to begin construction of what became known as the Berlin Wall, which would surround West Berlin. Construction preparations were made in great secrecy, and the border was sealed off in the early hours of Sunday, 13 August 1961, when most East German workers who earned hard currency by working in West Berlin would be at their homes. 

Source: Wikipedia

The construction of the Berlin Wall in August 1961 and the sealing of borders by the East Germans made Konrad Adenauer's government look weak. 

Source: Wikipedia