 Since the 1970s, contemporary Indigenous Australian artists have used acrylic paints in styles such as that of the Western Desert Art Movement, which leading critic Robert Hughes saw as "the last great art movement of the 20th century".Art is important both culturally and economically to Indigenous society; art critic Sasha Grishin concluded that central Australian Indigenous communities have "the highest per capita concentrations of artists anywhere in the world".Contemporary artists whose work has been exhibited internationally such as at the Venice Biennale, include Rover Thomas and Emily Kngwarreye, while designs were commissioned from several nationally recognised artists in 2006 for the new Musée du quai Branly buildings.