The map itself is undated, but there are clues it was created in 1491: It quotes a book published that year, and Christopher Columbus may have consulted the map (or a copy) before his great voyage.

The blue glass beads from Venice journeyed around 10,000 miles to the Americas more than five centuries ago and were the size ...

Christopher Columbus was a 15th and ... Day to honor the original inhabitants of these lands. Columbus also continued to believe that he had found a route to Asia, despite the increasing evidence ...