Adam Freytag
{{short description|Polish engineer}}
{{unreferenced|date=May 2019}}{{Expand Polish|topic=bio|Adam Freytag|date=April 2012}}
{{Infobox person
| name = Adam Freytag
| image = Tablica Adama Freytaga w Toruniu.jpg
| image_size = 180px
| caption = Memorial plaque at Freytag's childhood home in Toruń
| birth_date = 1608
| birth_place = Toruń, Polish–Lithuanian Commonwealth
| death_date = 1650
| death_place = 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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Category:Polish military engineers
Category:Polish people of the Smolensk War
Category:17th-century Polish mathematicians
Category:17th-century Polish physicians
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