Windsor Castle, situated in Berkshire, England, is the oldest and largest inhabited castle in the world. With a rich history spanning over 900 years, this majestic fortress has served as a royal residence, military stronghold, and iconic symbol of British monarchy. Windsor Castle's construction began in 1070 by William the Conqueror, shortly after the Norman Conquest of England. The castle's strategic location on a chalk outcrop overlooking the River Thames made it an ideal site for a fortified palace. Over the centuries, successive monarchs have modified and expanded the castle, adding architectural styles ranging from medieval to Gothic.