London, 5th March 2015: The sculpture known as Gift Horse, by German artist Hans Haacke, is unveiled in London's Trafalgar Square on the public space called the Fourth Plinth. London mayor Boris Johnson financed the 10th artwork to appear here. The skeletal, riderless horse (derived from The Anatomy of a Horse - George Stubbs, 1766) with a London Stock Exchange tickertape is a comment on power, money and history.