Elizabeth Tower in the context of "Revivalism (architecture)"

Clock towers are a specific type of structure that house a turret clock and have one or more clock faces on the upper exterior walls. Many clock towers are freestanding structures but they can also adjoin or be located on top of another building. Some other buildings also have clock faces on their exterior but these structures serve other main functions.

Clock towers are a common sight in many parts of the world with some being iconic buildings. One example is the Elizabeth Tower in London (usually called "Big Ben", although strictly this name belongs only to the bell inside the tower).

The Victoria Tower is a square tower at the south-west end of the Palace of Westminster in London, adjacent to Black Rod's Garden on the west and Old Palace Yard on the east. At 98.5 metres (323 ft) it is the tallest part of the palace, being 2.2 metres (7.2 ft) taller than the Elizabeth Tower (which contains Big Ben) at the north end of the building. It was designed by Charles Barry and Augustus Pugin in the Perpendicular Gothic style and was completed in 1860. It houses the Parliamentary Archives in archive conditions meeting the BS 5454 standard, on 12 floors. All 14 floors of the building were originally linked via a single wrought-iron Victorian staircase of 553 steps, of which five floors survive. The steps are made of granite quarried from Cairngall in Aberdeenshire.

The main entrance at the base of the tower is the sovereign's entrance, through which the monarch passes at the State Opening of Parliament. On top of the Victoria Tower is an iron flagstaff from which flies the Union Flag or, when the sovereign is present in the palace, the royal standard. The flag used to be flown only on days when either House of Parliament sat, but since January 2010 it has been flown every day.