Eaton's / John Maryon Tower
Eaton's / John Maryon Tower was a proposed supertall 140-storey office skyscraper, to be built in Toronto, Ontario, Canada. In 1971, Eaton's was to partner with a developer named John Maryon to build a 503 metre tower in the College Park area of Downtown Toronto.
Source: Wikipedia — Eaton's / John Maryon Tower (CC BY-SA 4.0)