Palace of Westminster
The Palace of Westminster, more commonly referred to as the Houses of Parliament, is the symbolic centre of political power in the United Kingdom and is one of the most recognisable and iconic buildings in the world.
The building, on the northern bank of the River Thames in London, incorporates the House of Commons and the House of Lords which together act as the UK's Parliament. It was designed according to the Gothic tradition by the architect Charles Barry together with Augustus Pugin, was constructed between 1840 and 1870. Perhaps its most iconic feature is the Elizabeth Tower, more famously known by the name of its bell, Big Ben.
 Middle Ages
The site on the northern bank of the Thames, originally known as Thorney Island, was the location of ecclesiastical buildings and royal power from the Middle Ages onwards. The first palace was constructed on the site in the tenth century, followed by the nearby Westminster Abbey, overseen by the newly crowned Edward the Confessor. The original Great Hall, still the largest in Europe, was built under the reign ofWilliam II andcompleted in 1099.
With the ceremonial focus beginning to shift to Westminster and away from the Anglo-Saxon capital of Winchester, the Model Parliament first met at the palace in 1295.
 Medieval period
In the late medieval period, the Palace served as the monarch's primary place of residence ensuring its status as the centre of government and royal authority, and a new range of buildings and courts were constructed. However, a fire in 1512 destroyed the residential area of the palace, forcing King Henry VIII to move elsewhere.
During the 16th and 17th centuries, the Chapel of St. Stephen's became home to the Commons Chamber where parliamentarians engaged in rigorous debate.
 Gunpowder Plot
The palace narrowly avoided being the target of an assassination attempt on 5 November 1605, as a group of provincial English Catholics sought to blow up the House of Lords during the State Opening of Parliament. After an anonymous letter alerted the authorities, Guy Fawkes was discovered hiding in the Lords guarding several barrels of gunpowder. This thwarting of the plot has now evolved into the traditional annual celebrations of Bonfire Night.
 18th century
There were calls for Parliament to move to a different location due to the Palace's increasing unsuitability. However, these calls were resisted and further construction work was undertaken to alter and enlarge the palace.
 19th century
Between 1824 and 1827, Sir John Soane undertook substantial remodeling works, including new library facilities and new law courts.
On 16 October 1834, a fire spread through the entire palace causing substantial damage, although Westminster Hall escaped.
Several different designs were proposed for a replacement building, but the Royal Commission selected Charles Barry's Perpendicular Gothic plan. It was thought that the Gothic revival design embodied traditional conservative values. An expert on the Gothic style, Augustus Pugin was brought in to assist with the detailing and other features such as the vanes and spires. The new Lords Chamber was completed in 1847, the Commons Chamber in 1852, and full construction completed in 1870.
 20th century - present
During the Blitz of the Second World War, the Palace was struck by bombs on 14 separate occasions, causing serious damage to the House of Commons. After the war, the Commons was redesigned, with construction works being completed in 1950.
Today, the Palace is one of the busiest Parliaments in the world, with more than a million people visiting each year.
The current palace building contains more than 1,100 rooms, 100 staircases and 3 miles (4.8 km) of passageways. The main rooms include:
- Norman Porch: The grand entrance to the Palace.
- Queen's Robing Room: Where the sovereign prepares for the State Opening of Parliament.
- Royal Gallery: The stage for the royal procession at State Openings of Parliament.
- House of Lords: The red-benched chamber which the Lords occupy.
- Central lobby: The heart of the palace, halfway between the two debating chambers.
- House of Commons: The green-benched chamber which the MPs occupy.Westminster Hall: The oldest existing part of the Palace, used traditionally for ceremonial purposes.
For many years, the Palace has been in need of serious renovation and restoration works, in particular to the external fabric of the building. A major programme of repair and conservation is intended to start during the 2020 Parliament.
In 2015, an Independent Options Appraisal Report found that the restoration costs could be as high as £7.1 billion should MPs and peers remain in the buildings whilst work is ongoing. Alternatively, the business of government could be temporarily relocated, for which a cost of £3.5 billion has been estimated.
On 30 November 2015, the Joint Committee on the Palace of Westminster, co-chaired by the Leader of the House of Commons and the Leader of the House of Lords, launched a consultation on the restoration and renewal of the building.
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