University of Wroclaw, Maps Department - History of the collection - lost due to war events first copy of woodcut map of Silesia by Martin Helwig from 1561. [1]Archived 2012-10-26 at the Wayback Machine
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cartography.geog.uu.nl
Martin Helwig Map of Silesia 1561 - first woodcut map of Silesia made on the basis of surveys and data collected from local inhabitants - published 1561. Utrecht University; Utrecht Studies in the History of Cartography, vol. 6 "Explokart: Mappæ Antiquæ". Archived from the original on 2012-03-02. Retrieved 2012-02-22.
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Martin Helwig Map of Silesia 1561 - first woodcut map of Silesia made on the basis of surveys and data collected from local inhabitants - published 1561. Utrecht University; Utrecht Studies in the History of Cartography, vol. 6 "Explokart: Mappæ Antiquæ". Archived from the original on 2012-03-02. Retrieved 2012-02-22.
University of Wroclaw, Maps Department - History of the collection - lost due to war events first copy of woodcut map of Silesia by Martin Helwig from 1561. [1]Archived 2012-10-26 at the Wayback Machine