Classen, (11 February 1725 – 24 March 1792) was a Danish-Norwegian industrialist, major general, landowner and founder of Det Classenske Fideicommis.
He served as chancellery adviser to King Frederik V.
Classen built the manor house Arresødal in 1773, he renovated the Neoclassical manor house Corselitze in 1777, and built the General's Summerhouse by the Corselitze Forest.