Markus Wiese lives and works in Dortmund. Since 1986 working as a sprayer under the pseudonym Mason. At first his spray radius was limited to the Dortmund area alone. First solo exhibition in 1990. 1991 he visits New York, 1992 further exhibitions and picture author for various graffiti magazines. Further visits to New York. Since 1993 Markus Wiese also makes his living with commissioned works.