outstanding monumental self-portrait of Andy Warhol was sold at Christie's auction for £ 10, 8 million. The work was completed in 1967 as part of a series of 11 well-known self-portraits. She was discovered only recently, as a self-portrait from 1974 are in private collections and exhibited publicly. Preliminary assessment of the work ranged from £ 3 to £ 5 million. "It was really exciting to work with a picture of Warhol, previously unknown, and the only such historically significant - says the director of the Department of Post-War and Contemporary Art Christie's Francis Autrid Europe. - She was impressed and riveted the attention of a huge number of interested buyers on the show, and in the auction room and therefore it was sold for an amount to twice its estimate. " Sold "Self" refers to sign a series of 11 large-scale works created in 1967, five of which today are the leading international museums (London's Tate Gallery, National Gallery of Modern Art Munich, the Museum of Modern Art in San Francisco and Detroit Institute Art, whose collection includes two works). The significance of this series is the fact that 8 out of 11 self-portraits were included in a large-scale retrospective exhibition of the artist, held at the New York museum MoMA in 1989, two years after his death.