London is the capital of the United Kingdom and has a population of over 7 million people. The Tower of London was built after the Norman conquest in 1066 and was originally intended as a fortress but later served as a palace, prison, and now museum housing the crown jewels. Westminster contains the Houses of Parliament, Westminster Abbey, and Buckingham Palace. The Houses of Parliament consists of the House of Commons and House of Lords and contains the famous clock tower Big Ben. Westminster Abbey has been the site of coronations since 1066 and contains tombs of famous British figures like Newton, Dickens, and Darwin. Buckingham Palace was formerly the residence of the British monarch and is now the Queen's official residence.