Street art
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Street art is visual art created in public locations for public visibility. It has been associated with the terms "independent art", "post-graffiti", "neo-graffiti" and guerrilla art.
Germany's Berlin Wall (shown 1986) was a target of artists during its existence (1961–1989).
Street art by Kevin Larmee, SoHo, New York City (1985)
The 2010 recreation of Keith Haring's original 1982 mural; New York City's Bowery Mural wall at Houston Street and the Bowery
Reverse graffiti
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Reverse graffiti is a method of creating temporary or semi-permanent images on walls or other surfaces by removing dirt from a surface. It can also be done by simply removing dirt with the fingertip from windows or other dirty surfaces, such as writing "wash me" on a dirty vehicle. Others, such as graffiti artist Moose, use a cloth or a high-power washer to remove dirt on a larger scale.
A message written in dirt on the back of a van
Part of a piece by Moose in San Francisco, California