Mark Welser
Mark Welser (1558–1614) was a German banker, politician, and astronomer, who engaged in learned correspondence with European intellectuals of his time. Of particular note is his exchange with Galileo Galilei, regarding sunspots. Provided by Wikipedia-
1by Bertius, Petrus, 1565-1629, Mercator, Gerhard, 1512-1594, Ptolemy, Claudius, Ortelius, Abraham, Welser, MarcusGet access
Published 1618
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