Keith Hartley is Chief Curator and Deputy Director of the Scottish National Gallery of Modern Art in Edinburgh. He has written widely on modern and contemporary Scottish art, including Scottish Art Since 1900, The Vigorous Imagination, Douglas Gordon: Superhumanatural and, in 1986, John Bellany. He is an expert on modern German art, curating exhibitions and writing catalogue essays on The Romantic Spirit in German Art, Otto Dix, Gerhard Richter, Anselm Kiefer and Vienna 1908-1918. He has also written on modern American artists, including Andy Warhol, Ed Ruscha and Robert Mapplethorpe.