Windsor Castle is one of the most famous castles that served as the residence for several English monarchs throughout history. Established in the 11th century by William the Conqueror, it has since become a symbol of the British monarchy. Windsor Castle is notable for its architectural grandeur and historical significance, hosting state occasions and royal ceremonies. Over the centuries, it has been expanded and renovated, reflecting various architectural styles. The castle remains an official residence of the Queen, used for official functions and as a venue for royal family gatherings, making it a key landmark in British heritage and culture.