Westminster is an area of central London within the City of Westminster on the north bank of the River Thames. Westminster's concentration of visitor attractions and historic landmarks, one of the highest in London, includes the Palace of Westminster, Buckingham Palace, Westminster Abbey and Westminster Cathedral.

Westminster is a city in its own right, the twin to the ancient City of London further east and historically they jointly formed the focus of what is today regarded as London. The Palace of Westminster came to be the principal royal residence after the Norman Conquest of England in 1066, and later housed the developing Parliament and law courts of England