Anthony Coucheron (also recorded as Anton Coucheron or Anthony Willemsen; c.1650 – 14 March 1689) was an engineering officer. Coucheron played an important role in the history of Norwegian and Danish fortifications. As Sweden grew to be a great power in the 17th century, there were frequent wars in the Baltic region, and conflict was common along the borders between Sweden & Denmark-Norway. Easy invasions routes from Sweden were fortified on the Danish-Norwegian border with new or upgraded fortresses during this period, effectively establishing the modern borders between Norway & Sweden. Anthony Coucheron played a major role in fortification of the border, both in Norway and Denmark in addition, he participated with honor in combat during the Gyldenløve War.