When the Moors overran the Iberian peninsula at the opening of the eighth century, legend has it that the bishop of Oporto in Portugal led six other bishops and their followers westward across the Atlantic. He settled upon an island farther west than any sailor from Europe had ever been before, and he named it Antilla (which has had a variety of spellings). He allegedly burned his ships so that no one could return with news of his refuge. He assigned each bishop a portion of the island, and soon there were seven flourishing Christian communities established on Antilla. In the generations that followed, these people prospered in their remote hideaway cut off from Europe.
Buker, George E.
"The Search for the Seven Cities and Early American Exploration,"
Florida Historical Quarterly: Vol. 71:
2, Article 4.
Available at: https://stars.library.ucf.edu/fhq/vol71/iss2/4