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.

A newly analyzed medieval manuscript suggests that sailors from the same region as Christopher Columbus may have known about ...

Christopher ... Columbus’s expedition as an opportunity to expand Spain’s trading network into the Indies’ lucrative economy. Proponents of the Catholic Church, the monarchy also hoped the ...