Toronto (/təˈrɒntoʊ/, colloquially /ˈtrɒnoʊ/) is the largest city in Canada and the provincial capital of Ontario. It is located in Southern Ontario on the northwestern shore of Lake Ontario. A relatively modern city, Toronto's history dates back to the late-18th century, when its land was first purchased by the British monarchy from the Mississaugas of the New Credit. The settlement was later established as the Town of York and proclaimed as the new capital of Upper Canada by its lieutenant-governor, John Graves Simcoe. In 1834, York was incorporated as a city and renamed to its present name. The city was ransacked in the Battle of York during the War of 1812 and damaged in two great fires in 1849 and in 1904. Since its incorporation, Toronto has repeatedly expanded its borders through amalgamation with surrounding municipalities, most recently in 1998.

With over 2.6 million residents, it is the fifth most populous city in North America. Its metropolitan area has over 5.5 million residents. Toronto is at the heart of the Greater Toronto Area (GTA), and is part of a densely populated region in Southern Ontario known as the Golden Horseshoe, which has a population of nearly 9 million people as of 2011. The census metropolitan area (CMA) had a population of 5,583,064, and the Greater Toronto Area had a population of 6,054,191 in the 2011 Census. Its cosmopolitan and international population reflects its role as an important destination for immigrants to Canada. Toronto is one of the world's most diverse cities by percentage of non-native-born residents, with about 49% of the population born outside Canada. Toronto is also consistently rated as one of the world's most livable cities by the Economist Intelligence Unit and the Mercer Quality of Living Survey.

In local government, a city hall, town hall or (more rarely) a municipal building or civic centre, is the chief administrative building of a city town or other municipality. It usually houses the city or town council, its associated departments, and their employees. It also usually functions as the base of the mayor of a city, town, borough, or county.

By convention, until the mid 19th-century, a single large open chamber (or 'hall') formed an integral part of the building housing the council. The hall may be used for council meetings and other significant events. This large chamber, the 'town hall', (and its later variant 'city hall') has become synonymous with the whole building, and with the administrative body housed in it. The terms 'council chambers', 'municipal building' or variants may be used locally in preference to 'town hall' if no such large hall is present within the building. Sometimes, like Birmingham Town Hall in the English Midlands, municipal buildings act as a public social venue and as a building completely separate from the administrative centre; Birmingham uses the Council House for local governance.

The City Hall of Toronto, Ontario, Canada is the home of the city's municipal government and one of its most distinctive landmarks. Designed by Finnish architect Viljo Revell (with Heikki Castrén, Bengt Lundsten, Seppo Valjus) and landscape architect Richard Strong, and engineered by Hannskarl Bandel, the building opened in 1965. It was built to replace Old City Hall, which was built in 1899. The current City Hall, located at Nathan Phillips Square, is actually Toronto’s fourth city hall and was built in order to replace the former city hall due to a shortage of space. The area of Toronto City Hall and the civic square was formerly the location of Toronto's Old Chinatown, which was expropriated and bulldozed during the mid-1950's in preparation for a new civic building.

In 1958, an international architectural competition was launched by Mayor Nathan Phillips in order to find a design for the New City Hall. This competition was won by Finnish architect Viljo Revell whose winning proposal came first amongst submissions from forty-two countries. Revell’s design consists of twin towers surrounding a white disk-like council chamber which is mounted on a raised platform, with entrances located below that are open to the public. There is also a ramp from the square that connects to the podium green roof and also leads to the council chamber. The two towers are of unequal height as the east tower is taller than the west. The City Hall is nicknamed “The Eye of the Government” because it resembles a large eye in a plan view. Revell died a year before the New City Hall was completed.