The Zeno chart and Frisland
A book printed in Venice in 1558 described a voyage made in 1380 to an island that stayed on maps of the Atlantic for a century.
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The Zeno Chart of 1558 and a Voyage Claimed for 1380
A thin book printed in Venice in 1558 described two brothers who sailed into the Arctic a century before Columbus. Its map put an island south of Iceland that sailors searched for, sighted, and never found.