Windsor Castle has been the residence of monarchs since Henry I in the early 12th century, making it Europe’s oldest palace still in use. The State Apartments define the northern side of The Quadrangle in the Upper Ward. Seen here are the official entrance, St. George’s Hall and the guest entrance. These lavish accommodations were begun by Edward III in the 14th century and transformed by architect Hugh May for Charles II in the 17th century. They were further enhanced during the reign of King George III (1760 – 1820). Then his son and successor, George IV, hired Jeffry Wyatville to embellish the rooms in an array of architectural styles. Queen Elizabeth II frequently spends weekends here, as well as a month around Easter and one week in June during the service of the Order of the Garter. The Royal Standard is raised above the Round Tower when Her Majesty is in residence.