The Marble Arch is a monument made entirely of marble, located near Hyde Park in London, right next to the Speakers' Corner.
The Marble Arch, built entirely of white Carrara marble by John Nash, was erected in the Mall as the main entrance to the newly rebuilt Buckingham Palace. However, during the reign of Queen Victoria, it was moved to its present location. Rumour has it that this transfer of the arch was necessary due to it being too narrow for the Queen's carriage to pass through.
The Marble Arch can be crossed only by the Royal Family or by the Royal Army troops. In 1953, during the coronation ceremony of Queen Elizabeth II, the Queen crossed the Marble Arch, dispelling the myth that it was too narrow for the royal carriage.