St George's Chapel is one of the finest examples of Gothic architecture in England. It is the spiritual home of the Order of the Garter, established in 1348 by Edward III. Within the chapel are the tombs of ten sovereigns. The organ loft was built during restoration works in the reign of King George III. The design was by Henry Emlyn and it is constructed of Coade stone (an artificial stone).

One of a series of castles that William I (reigned 1066-1087) established around London, Windsor occupied the nearest strong point in the Thames Valley to the west of the city. By the reign of Henry I (1100-1135) the creation of a large hunting forest, together with the proximity of London, made this a favoured royal residence as well as a fortress. It is the largest inhabited castle in the world and the oldest in continuous occupation. In 1992 a fire damaged approximately one-fifth of the castle; restoration was completed in 1997.