No, that is all European fantasy derived from a lack of proper interpitation and understanding, and a Washington Irvine novel. Nothing more than a myth. There were a few that tried to argue a flat earth, but were quickly dismissed.

"Myths are important in the study of History and the development of human psychology, as well as for their general cultural importance."

Very true, and some are facinating. but I personally have no interest in myths.

"The earlier knowledge of the ancient astronomers was lost in Europe"

This could be true, but this only speaks for Europe. Columbus didn't believe the world was flat. He left in search of the New World, which was known to exist.