Big Ben is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London. The clock tower, officially known as the Elizabeth Tower, was completed in 1859 and stands at 316 feet tall. It is one of the most famous landmarks in the United Kingdom and is known for its accuracy and its distinctive chimes. The name "Big Ben" originally referred to the largest of the tower's five bells, which weighs over 13 tons. The clock itself has a diameter of 22.5 feet, and its minute hand is over 14 feet long. Big Ben is a symbol of London and is often featured in films and photographs representing the city.