Wait, draw me a map !
How does the disproval of Christopher Columbus effect Christendom ?
And he knew the world was a sphere ? Yes. Everyone did. For a very, very long time.
“Everyone did.”
Not according historical revisionists who want to paint the European faithful as ignorant.
Ironically, Eratosthenes (about 200 B.C.) accurately calculated the circumference of the earth (probably within a few hundred miles of the correct figure). Columbus’ estimate was thousands of miles off, which is why he thought it was possible to sail from Spain to Japan.
Research, a lot of it, would help you.