The term Urban Art refers to a contemporary art movement and is mostly used as an umbrella term for all art movements in urban spaces. Urban art emerged from the uncommercial, often illegal art forms of graffiti and street art, and is now seen as art that relates to the urban environment, created by artists living in cities who thematically address the urban lifestyle and consider the city as their working space. By establishing urban art as a recognized art movement in its own right, street artists* are able to legally express themselves in various locations around the city, or bring urban art to museums or galleries as commissioned work. Urban art encompasses very different materials and techniques, has an enormous diversity of content, form and geography, and can integrate everything that the urban environment offers.