Parliament Hill (French: Colline du Parlement), colloquially known as The Hill, is an area of Crown land on the southern banks of the Ottawa River in downtown Ottawa, Ontario, Canada. Its Gothic revival suite of buildings is the home of the Parliament of Canada and has architectural elements of national symbolic importance. Parliament Hill attracts approximately 3 million visitors each year. Law enforcement on Parliament Hill and in the parliamentary precinct is the responsibility of the Parliamentary Protective Service (PPS).

Originally the site of a military base in the 18th and early 19th centuries, development of the area into a governmental precinct began in 1859, after Queen Victoria chose Ottawa as the capital of the Province of Canada. Following a number of extensions to the parliament and departmental buildings and a fire in 1916 that destroyed the Centre Block, Parliament Hill took on its present form with the completion of the Peace Tower in 1927. Since 2002, an extensive $1 billion renovation and rehabilitation project has been underway throughout all of the precinct's buildings; work is not expected to be complete until after 2028.

The Parliament Buildings are three edifices arranged around three sides of Parliament Hill's central lawn, the use and administration of the spaces within each building overseen by the speakers of each chamber of the legislature. The Centre Block has the Senate and Commons chambers, and is fronted by the Peace Tower on the south facade, with the Library of Parliament at the building's rear. The East and West Blocks each contain ministers' and senators' offices, as well as meeting rooms and other administrative spaces. Gothic Revival has been used as the unifying style of all three structures, though the Centre Block is a more modern Gothic Revival, while the older East and West Blocks are of a Victorian High Gothic.

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