The Onderneming, or ’The Company’, is an historic corn mill located on Molenweg in the town of Witmarsum. The Company Mill was built in 1850 by the mill-maker Van der Meer of Harlingen. The Company Mill was in commercial use until 1994, and and is now owned by Wunseradiel County. The mill is open to the public every Saturday afternoon, with tours available on other days upon request.