What is now Canada has been sparsely inhabited for millennia by scattered Native American tribes (notably the Inuit in the Arctic Circle regions). Much of modern-day Canada was initially comprised of the Hudson Bay Company's Rupert's Land from the late 1600s to 1870, when the HBC sold the entirety of Rupert's Land to the British government. The Canadian Confederation was first established with the Constitution Act of 1867 and was initially comprised of just Ontario. Another five provinces and four territories were added between then and 1952.