The other name of the British Parliament is the Palace of Westminster. Officially it is still a royal palace today, though it is no longer the home of the king/queen of England. Kings between Edward the Confessor and Henry VII used to live here (11-15th c.).
Left (South): Victoria Tower (the Union Jack is flown when Parliament is in session); Centre: Central Tower; Right (North): Clock Tower with Big Ben; House of Lords (South): between Victoria Tower and the Central Tower; House of Commons (North): Between the Central Tower and the Clock Tower.