A new sculpture for Trafalgar Square 's CNN unveiled Thursday . 'Gift Horse ' by German-born artist Hans Haacke will sit on plinth for 18 months . Haacke 's is the 10th artwork to be displayed on the plinth .
A new sculpture for Trafalgar Square 's Fourth Plinth unveiled Thursday . 'Gift Horse ' by German-born artist Hans Haacke will sit on plinth for 18 months . Haacke 's is the 10th artwork to be displayed on the plinth .