The map of the world, discovered in the mid-1950s bound into an authentic medieval history of the Mongol invasions, shows Europe, western Asia and north Africa — and, in the upper left corner, a craggy-looking island labeled "Vinland Island" in Latin.

I'm sure I read somewhere, although I find myself without sources at present, that there was evidence to suggest the Vikings had been to America in the 13th century.

L'Anse aux Meadows ( from the French L'Anse-aux-Méduses or "Jellyfish Cove") is an archaeological site on the northernmost tip of the island of Newfoundland in the Canadian province of Newfoundland and Labrador. Discovered in 1960, it is the only known site of a Norse village in North America. It has been dated to around 1000 A.D.

Christopher Columbus, as everyone knows, is honored by posterity because he was the last to discover America.
James Joyce

If America had been discovered as many times as I have, no one would remember Columbus.
Sean Connery