Big Ben is a clock tower that stands at the north end of the Palace of Westminster in London, England. The nickname "Big Ben" refers to the Great Bell of the Great Clock of Westminster and, by extension, the tower itself. Originally known simply as the Clock Tower, it was renamed Elizabeth Tower in 2012 to mark the Diamond Jubilee of Elizabeth II. …Big Ben is a clock tower that stands at the north end of the Palace of Westminster in London, England. The nickname "Big Ben" refers to the Great Bell of the Great Clock of Westminster and, by extension, the tower itself. Originally known simply as the Clock Tower, it was renamed Elizabeth Tower in 2012 to mark the Diamond Jubilee of Elizabeth II. The clock is a striking clock with five bells.