The Hudson's Bay Company turned 342 years old in May of this year, making it the oldest commercial corporation in North America. Its history is a substantial portion of Canada's history, be it good or bad.
We'll be checking it out next time we fly to Toronto.
Hudson's Bay Company Trading Post page @ Pearson: http://www.torontopearson.com/PearsonContent.aspx?id=4294984928#%23
Hudson's Bay website: www.thebay.com