On January 1, 1998, Toronto was greatly enlarged, not through traditional annexations, but as an amalgamation of the Municipality of Metropolitan Toronto and its six lower-tier constituent municipalities: East York, Etobicoke, North York, Scarborough, York, and the original city itself. They were dissolved by an act of the Government of Ontario, and formed into a single-tier City of Toronto (colloquially dubbed the "megacity") replacing all six governments.
