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.
Old Toronto
Old Toronto is the retronym of the area contained within the original boundaries of Toronto, Ontario, Canada, from 1834 to 1998. It was first incorporated as a city in 1834, after being known as the town of York, and became part of York County. In 1954, it became the administrative headquarters for the Regional Municipality of Metropolitan Toronto. The city expanded in size by annexation of surrounding municipalities, reaching its final boundaries in 1967. Finally, in 1998, it was amalgamated with the other cities of Metropolitan Toronto (York, North York, Etobicoke, Scarborough); and the borough of East York, into the present-day city of Toronto. This was not a traditional annexation of the surrounding municipalities (where a city absorbs the said municipalities but officially remains the same city), but rather a new municipal entity that is the successor of the original city.