Buckingham Palace is the official residence of the British monarch in London. It was first occupied by Queen Victoria in 1837 and now houses over 600 rooms. Nearby, the Changing of the Guard ceremony occurs daily at 11:30 AM at the palace gates. Westminster is about a mile west of the City of London and remains the center of the British government, containing landmarks like Big Ben, Westminster Abbey, and the Houses of Parliament. The Tower of London served as a royal palace, fortress, and prison, and now houses the Crown Jewels and raven exhibit. London offers many museums, parks, landmarks and shopping areas, making it a top tourist destination.