11th century: The original Palace of Westminster was constructed as a royal residence for King Edward the Confessor.
13th century: The Great Hall, Westminster Hall, was built by King Henry III. It still stands today and serves as the oldest part of the Houses of Parliament.
14th century: The first Parliament was held in the Palace of Westminster in 1295, during the reign of King Edward I.
16th century: A devastating fire in 1512 destroyed most of the Palace of Westminster, including the Great Hall.
17th to 19th centuries: Reconstruction and renovation of the Palace of Westminster took place over several centuries, including the addition of the iconic clock tower and bell, Big Ben, completed in 1858.
20th century: Further restoration work was carried out in the 20th century, particularly after damage sustained during World War II.
As a result of the ongoing construction and renovations, the Houses of Parliament in London represent various architectural styles, blending medieval, Gothic, and Victorian influences. They continue to serve as the meeting place for both the House of Commons and the House of Lords, which form the Parliament of the United Kingdom.