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.
York Centre
York Centre was originally created in 1903 from parts of York East and York West ridings. It was created when the county of York (excluding the city of Toronto) was divided into three ridings: York Centre, York North and York South. The centre riding consisted of the townships of Etobicoke, Markham, Scarborough and Vaughan, and the villages of Markham, Richmond Hill, Weston and Woodbridge. The electoral district was abolished in 1914 when it was redistributed between York East, York South and York West. In 1952, York Centre was re-designated with parts of Eglinton—Lawrence, Willowdale, York North and York West ridings.