Lucian Freud, the controversial grandson of Sigmund Freud, has been called one of the greatest painters of the 20th century. His extraordinary portraits - of children, lovers, gangsters, supermodels, even the Queen of England - pushed the boundaries of art and broke world records at auction. They also enraged sitters and ended friendships. The royal photographer for The Times of London was so incensed by Freud's picture of the Queen that he said Freud should be thrown from the Tower of London. F...