The Palace of Westminster is more commonly known as the Houses of Parliament and is one of the most famous landmarks in the city of London in the United Kingdom. The new palace contains more than 1200 rooms. This palace was built in the nineteenth century to replace the parliament buildings built in the Middle Ages, and you can join one of the organized tours inside this palace, especially on Saturdays, to learn more about the history of this great and famous building and its importance as one of the best architectural buildings Astonishing in the world.