The most famous clock in the world is known as Big Ben, which is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London. Although often referred to as the clock itself, Big Ben actually refers to the 13.5-ton bell housed within. The clock tower, officially named the Elizabeth Tower, was completed in 1859 and has since become an enduring symbol of British culture and history. Big Ben is renowned for its accuracy and its iconic chimes, which have been featured in numerous films and television shows, solidifying its status as an international landmark.