Australian art incorporates art made in Australia or about Australian subjects since prehistoric times. This includes Australian Aboriginal art, Australian Colonial art, Landscape, Atelier, Modernist and Contemporary art. The visual arts have a long history in Australia, with evidence of Aboriginal art dating back at least 30,000 years. Australia has produced many notable artists from both Western and Indigenous Australian traditions including the late 19th century Heidelberg School plein air painters, Central Australian Hermannsburg School watercolourists (most notably Albert Namatjira), Western Desert Art Movement, Heide Circle of Modernists, and the expatriates who worked in London in the nineteen sixties. Traditionally the art market has strongly supported oil paintings of Australian landscapes. In the work of artists Eugene Von Guerard, Arthur Streeton, Russell Drysdale, Sidney Nolan and Louise Hearman, the human figure has been placed within an Australian landscape. In photography, Harold Cazneaux, Max Dupain, Wolfgang Sievers, Mark Strizic[6], Rennie Ellis and Tracey Moffatt are examples of artists noted for their documentation of urban Australia. Since the late 1990s, senior Indigenous artists like Yannima Tommy Watson and Mirdidingkingathi Juwarnda Sally Gabori, Baby Boomer and Generation X contemporary artists have commanded a rapidly increasing share of a domestic art market that has long been both cultural nationalist and internationalist.