Erhard Ratdolt was an early German printer. From Augsburg, he was active printing in Venice, where he worked from 1476 to 1486. There he produced a Kalendario (1476) for Regiomontanus, and editions of the "Historia Romana" of Appianus (1477), and "Euclid's Elements" (1482), solving the problem of reproducing mathematical diagrams. Other works were the "Poeticon astronomicon", also from 1482, Haly Abenragel (1485),and Alchabitius (1503). Wikipedia
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