Elizabeth Tower (formerly known as the Clock Tower of the Palace of Westminster or commonly known as Big Ben) is a clock tower structure on the north-east face of the Houses of Parliament in Westminster, the capital of London, the country Older brother. Technically, Big Ben is the name of the largest alarm bell inside the clock tower, weighing 13.7 tons, of five hourly chimes every 15 minutes placed inside the tower. The clock tower is also mistakenly called the St.

On the battle day commemorating the 60th anniversary of Queen Elizabeth II's reign, the British Parliament announced Big Ben would be renamed Elizabeth Tower as of June 4, 2012.

The tower is an internationally recognized British cultural icon, a symbol of stability, security and democracy. It is one of the most prominent symbols of Great Britain and parliamentary democracy, and the tower is often used in the London scene. The clock tower has been part of a Grade I listed home architecture since 1970 and a UNESCO World Heritage Site since 1987.