Adam Freytag - Wikipedia

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Adam Freytag
Memorial plaque at Freytag's childhood home in Toruń
Born	1608 Toruń, Polish–Lithuanian Commonwealth
Died	1650 Kėdainiai, Polish–Lithuanian Commonwealth

Adam Freytag (1608–1650) was a Polish military engineer, mathematician and physician. He is best known for his work Architectura militaris nova et aucta, the first manual of bastion fortifications of the so-called Old Dutch system, published in 1631. In 1633–1634, he served as a Polish military engineer in the Smolensk War.

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