The Houses of Parliament is a very large building which stands near the Thames. There are two tall towers at the corners of the building and one of them is the Clock Tower.
The English people built the tower and the clock in The clock has four faces and a very big loud bell. The bell weighs 13 tons. The man in charge of the building was Sir Benjamin Hall. This man was very tall, and the workers and his friends called him Big Ben. So they called the bell Big Ben too. Sometimes people call the clock and the Clock Tower Big Ben.
The people of London who live near the Houses of Parliament can hear the sound of the bell every hour. Other people hear it on the radio. On New Years night people come to the Clock Tower to see the New Year in.