Gift Horse by Hans Haacke is unveiled by The Mayor of London, Boris Johnson, as the tenth commission for the Fourth Plinth in Trafalgar Square, 5 Mar 2015, London. The sculpture portrays a skeletal, riderless horse &ndash; a &lsquo;wry&rsquo; comment on the equestrian statue of William IV originally planned for the plinth. Tied to the horse&rsquo;s front leg is an electronic ribbon displaying live the ticker of the London Stock Exchange, completing the link between power, money and history. The horse is derived from an engraving in the Anatomy of a Horse of 1766 by George Stubbs; the famous English painter whose works are represented in the National Gallery at Trafalgar Square. Hans Haacke is one of Germany&rsquo;s most important contemporary artists, known for his installations in the Reichstag in Berlin, and for taking a sledgehammer to the floor of the German Pavilion at the 1993 Venice Biennale in protest against the building&rsquo;s Nazi-style architecture.