The most famous clock tower in London is the Big Ben, which is actually the nickname for the Great Bell of the clock located within the Elizabeth Tower at the northern end of the Palace of Westminster. While many mistakenly refer to the entire clock tower as Big Ben, the name originally applied to the bell itself. Completed in 1859, the tower stands at 316 feet tall and is an iconic symbol of London, frequently featured in films, postcards, and tourism. The clock mechanism is renowned for its reliability, and the tower has become a cultural landmark, recognized around the world.