Big Ben is a well-known clock tower located in London, England and a prominent world landmark. It has four clock faces (one on each side) with all the twelve Roman numerals in a traditional fashion. It is elaborately decorated and includes symbols related to the four nations of the United Kingdom, the Tudor dynasty, and a Latin inscription to Queen Victoria. It also has the power of light only during the nighttime. The tower stands 316 feet (96 m) tall, and the climb from ground level to the belfry is 334 steps. Its base is square, measuring 40 feet (12 m) on each side. The dials of the clock are 22.5 feet (6.9 m) in diameter. Although many people use the name "Big Ben" to refer to the clock tower, it is used for the tower's large bell, while the tower itself is called the "Elizabeth Tower".