"The Lennon Wall or John Lennon Wall. Once a normal wall, since the 1980s it has been filled with John Lennon-inspired graffiti and pieces of lyrics from Beatles songs.
In 1988, the wall was a source of irritation for the communist regime of Gustav Husak. Young Czechs would write grievances on the wall and in a report of the time this led to a clash between hundreds of students and security police on the nearby Charles Bridge. The movement these students followed was described ironically as "Lennonism" and Czech authorities described these people variously as alcoholics, mentally deranged, sociopathic, and agents of Western capitalism." source: Wikipedia
118 00 Praha
Very close to the Charles Bridge so stop by when you are heading to Charles Bridge.
closest station: Hellichova or Malostranske namesti (tram) or Malostranska (green line metro "A")