Fourth plinth, Trafalgar Square

The Fourth plinth is the northwest plinth in Trafalgar Square in central London. It was originally intended to hold an equestrian statue of William IV, but remained bare due to insufficient funds. For over 150 years the fate of the plinth was debated; in 1998, the Royal Society for the encouragement of Arts, Manufactures and Commerce (RSA) commissioned three contemporary sculptures to be displayed temporarily on the plinth. Shortly afterwards, Chris Smith, the then Secretary of State for Culture, Media and Sport commissioned Sir John Mortimer to conduct a public enquiry that sought opinions from public art commissioners, critics and members of the public as to the future of the plinth.

The final report recommended that the commissions remain a rolling programme of temporary artworks rather than settling permanently on one figure or idea to commemorate. In 2003, the ownership of Trafalgar Square was transferred from Westminster City Council to the Mayor of London and this marked the beginning of the Mayor of London’s Fourth Plinth Commission as it is now known.

There is a plinth at each of the four corners of the square. The two southern plinths carry sculptures of Henry Havelock and Charles James Napier. The northern plinths are larger than those as they were designed to have equestrian statues, and indeed the northeastern plinth has one of George IV. The fourth plinth on the northwest corner, designed by Sir Charles Barry and built in 1841, was intended to hold an equestrian statue of William IV but remained empty due to insufficient funds.

In 1998, the Royal Society of Arts (RSA) conceived the Fourth Plinth Project, which temporarily occupied the plinth with a succession of works commissioned and established by Cass Sculpture Foundation These were:

...
Wikipedia