Windsor Castle

Windsor Castle is a royal residence in the city of Windsor, in the English county of Berkshire.

An excerpt from the article 36 facts about Windsor Castle

It was built between 1070 and 1086 by William I the Conqueror, also known as William the Bastard, King of England and Duke of Normandy.

William the Conqueror ordered the construction of several castles to defend the roads leading to London. It was important that the distance between them and the capital could be covered in less than one day (about 32 km) so that the messengers could notify the royal army of the enemy's entry.