Buckingham Palace, located in London, is the official residence of the British monarch and serves as the administrative headquarters. Originally built in 1703 as Buckingham House for the Duke of Buckingham, it became the royal residence in 1837 when Queen Victoria moved in. With its grand architecture, extensive gardens, and 775 rooms, the palace is a symbol of British royalty and history, attracting visitors from around the world to witness its opulent state rooms and iconic balcony where the royal family greets crowds.