Big Ben is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London, and often extended to refer to the clock and the clock tower.
The tower is officially known as the Elizabeth Tower, renamed as such to celebrate the Diamond Jubilee of Elizabeth II (prior to being renamed in 2012 it was known simply as "Clock Tower"). The tower holds the second largest four-faced chiming clock in the world (Minneapolis City Hall being the largest). The tower was completed in 1858 and had its 150th anniversary on 31 May 2009, during which celebratory events took place.[5][6] The tower has become one of the most prominent symbols of the United Kingdom and is often in the establishing shot of films set in London.
The Elizabeth Tower (previously called the Clock Tower), named in tribute to Queen Elizabeth II in her Diamond Jubilee year, more popularly known as Big Ben, was raised as a part of Charles Barry's design for a new palace, after the old Palace of Westminster was largely destroyed by fire on the night of 16 October 1834. The new Parliament was built in a Neo-gothic style. Although Barry was the chief architect of the Palace, he turned to Augustus Pugin for the design of the clock tower, which resembles earlier Pugin designs, including one for Scarisbrick Hall. The design for the tower was Pugin's last design before his final descent into madness and death, and Pugin himself wrote, at the time of Barry's last visit to him to collect the drawings: "I never worked so hard in my life for Mr Barry for tomorrow I render all the designs for finishing his bell tower & it is beautiful." The tower is designed in Pugin's celebrated Gothic Revival style, and is 315 feet (96.0 m) high.