The story
Founded by Johan Frederik Classen.1
Classen (1725–1792) was an enterprising businessman and industrialist who developed an armaments and munitions factory in northwest Zealand. He called it Frederiksværk (Frederik's factory) in honour of King Frederik V who had provided land and incentives for its establishment. Thanks to the profits he made as sole supplier to the Danish army, especially during the Seven Years' War (1756–1763), Classen was able to expand his production facilities and attract other industries to Frederiksværk which quickly became a thriving town and major industrial centre. In addition to his business activities, Classen was adept at farming and forestry. In 1768, he bought land on Falster, where he comprehensively renovated Corselitze, a large manor house, and in 1773 he developed large-scale plantations in the Frederiksværk area. Major General Classen built himself a summerhouse by the Corselitze Forest.
From Wikipedia’s article on Det Classenske Fideicommis, shared under CC BY-SA 4.0.4