The most famous clock in London is Big Ben, which is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster. Commonly, the term is also used to refer to the clock tower itself, now officially known as the Elizabeth Tower. Completed in 1859, it is an iconic symbol of London and the United Kingdom. Big Ben chimes regularly, and its clock face is known for its distinctive illuminated numbers. The tower is a popular tourist attraction and a central figure in London’s skyline and culture.