The Elizabeth Tower, formerly known simply as the Clock Tower, and popularly known as Big Ben, the name of the great bell within the tower itself, is a four-faced clock tower that sits adjoined to the Palace of Westminster in London, England.
In 1868, the tower was scaled by the Assassin Evie Frye, in order to repair the telegraph lines that ran through the building. One of the Frye twins scaled the Elizabeth Tower a second time later that year, when it was discovered that Templars from Boston had planted explosives throughout the Palace of Westminster, including one at the top of the clock Tower.