The Lennon Wall was once a normal wall, since the 1980s it has been filled with John Lennon-inspired graffiti and pieces of lyrics from Beatles songs.
Art - Graffiti
In 1988, the wall was a source of irritation for the then 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.