Street art: From tags on trains to international auction houses

She’s the reluctant icon of generations of street artists: photojournalist Martha Cooper became a cult figure after her 1984 book “Subway Art” inspired creative souls around the world. She’s now teamed up with renowned stencil artist Logan Hicks to revisit some of her images and give them a new, more painterly aspect. Cooper and Hicks join us in the studio to talk about the transformation of murals, tags and graffiti in recent years, as the ninth Urban Art Fair opens its doors in Paris. We also chat about meeting with a tattoo master in the Japan of the 1970s and how art can bring the natural world to the most urban of landscapes.