A new exhibition into the history of the fourth plinth opens today at the Institute of Contemporary Arts.
It will feature all the sculptures that made it onto the plinth as well as those that did not.
Artists included are Chris Burden, Allora & Calzadilla, Sokari Douglas Camp, Jeremy Deller, Elmgreen & Dragset and Tracey Emin.
Mayor of London, Boris Johnson, says it is an important event.
'I am immensely proud to support the Fourth Plinth,' he said. 'It has become a must-see cultural attraction for London, one that underpins the capital's status as a great world city for art.'