Windsor is a suburban town and tourist destination in the Royal Borough of Windsor and Maidenhead in Berkshire, England. It is best known as the site of Windsor Castle. Windsor Castle is the largest inhabited castle in the world and, dating back to the time of William the Conqueror, is the oldest in continuous occupation. The castle’s floor area is approximately 45,000 square metres. Together with Buckingham Palace in London and Holyrood Palace in Edinburgh, it is one of the principal official residences of the British monarch. Most of the kings and queens of England have had a direct influence on the construction and evolution of the castle, which has been their garrison fortress, home, official palace, and sometimes their prison. The castle’s history and that of the British monarchy are inextricably linked. Chronologically the history of the castle can be traced through the reigns of the monarchs who have occupied it. When the country has been at peace, the castle has been expanded by the additions of large and grand apartments; when the country has been at war, the castle has been more heavily fortified. This pattern has continued to the present day.