The Fourth Plinth is an empty statue pedestal in the north-west corner of Trafalgar Square. Having sat empty for most of the twentieth century, it is now the location for a series of continually changing artworks. The plinth was originally designed to complete the military theme of the square. It was to hold a warlike statue of William IV, the sailor king. When funding fell through the statue failed to materialise; attempts were made to find a replacement but these fell through for one reason or another, so the plinth stood empty until the public artwork programme began in 1999.