 The Upper Ward of Windsor Castle comprises a number of major buildings enclosed by the upper bailey wall , forming a central quadrangle . The State Apartments run along the north of the ward , with a range of buildings along the east wall , and the private royal apartments and the King George IV Gate to the south , with the Edward III Tower in the south @-@ west corner . The motte and the Round Tower form the west edge of the ward . A bronze statue of Charles II on horseback sits beneath the Round Tower . Inspired by Hubert Le Sueur 's statue of Charles I in London , the statue was cast by Josias Ibach in 1679 , with the marble plinth featuring carvings by Grinling Gibbons . The Upper Ward adjoins the North Terrace , which overlooks the River Thames , and the East Terrace , which overlooks the gardens ; both of the current terraces were constructed by Hugh May in the 17th century . 
