Street Art - Art EssentialsStreet Art is a phenomenon and subcultural movement that reaches from the darkest urban backstreets to the most glamorous international art fairs. Simon Armstrong examines how it evolved from its origins in the 1970s New York graffiti scene to embrace many new materials, styles and techniques along the way, tracing how this marginal art form graduated into art galleries and the art market, while also heavily influencing design, fashion, advertising