History of Toronto
In 1998, the six municipalities comprising Metropolitan Toronto – East York, Etobicoke, North York, Scarborough, York, and the old City of Toronto – and its regional government were amalgamated into a single City of Toronto (colloquially dubbed the "megacity") by an act of the Government of Ontario. This was despite a municipal referendum in 1997 that was overwhelmingly against amalgamation. Subsequently, Mel Lastman defeated Barbara Hall to become the first elected mayor of the megacity.
Areas of the City of York
York is an ancient English borough, and was one of the boroughs reformed by the Municipal Corporations Act 1835 to form a municipal borough. It gained the status of a county borough in 1889, under the Local Government Act 1888, and existed so until 1974, when, under the Local Government Act 1972, it became a non-metropolitan district in the county of North Yorkshire.