Welcome to Windsor Castle, a place where nearly one thousand years of history stands firmly beneath your feet. Located at Windsor S L four one N J, United Kingdom, this is the oldest and largest occupied castle in the world. As you stand here, you are joining a lineage of visitors that dates back to ten seventy, when William the Conqueror first chose this site high above the river Thames. It was originally built as a timber fortification to guard the western approaches to London, but over the centuries, it has evolved into a magnificent palace and a cherished family home for the British monarchy. Take a moment to look around the massive stone walls and feel the weight of countless coronations, state banquets, and royal moments that have shaped the global stage. You are currently in the presence of a working royal residence, a place that embodies the continuity of the British Crown like nowhere else.