Windsor Castle is a royal residence at Windsor in the English county of Berkshire. It is strongly associated with the English and succeeding British royal family, and embodies almost 1,000 years of architectural history.

The original castle was built in the 11^th century after the Norman invasion of England by William the Conqueror. Since the time of Henry I, it has been used by the reigning monarch and is the longest-occupied palace in Europe. The castle's lavish early 19^th-century State Apartments were described by early 20^th century art historian Hugh Roberts as "a superb and unrivalled sequence of rooms widely regarded as the finest and most complete expression of later Georgian taste". Inside the castle walls is the 15^th-century St George's Chapel, considered by the historian John Martin Robinson to be "one of the supreme achievements of English Perpendicular Gothic" design.

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Windsor Great Park is a Royal Park of 2,020 hectares (5,000 acres), including a deer park, to the south of the town of Windsor on the border of Berkshire and Surrey in England. It is adjacent to the private 265 hectares (650 acres) Home Park, which is nearer the castle. The park was, for many centuries, the private hunting ground of Windsor Castle and dates primarily from the mid-13th century. Historically the park covered an area many times the current size known as Windsor Forest, Windsor Royal Park or its current name. The only royal park not managed by The Royal Parks, the park is managed and funded by the Crown Estate. Most parts of the park are open to the public, free of charge, from dawn to dusk, although there is a charge to enter Savill Garden.

The park is Grade I listed on the Register of Historic Parks and Gardens. Windsor Forest and Great Park is a Site of Special Scientific Interest.

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