The Vinland map is purportedly a 15th century mappa mundi, redrawn from a 13th century original. Drawn with black ink on animal skin, the map is the first known depiction of the North American coastline. The map has been controversial since it was first revealed in 1965, and both the most recent chemical analysis and the most recent scholarly monograph on the subject have suggested that it is a forgery.Credit: Author unknown; scan by Yale University