The Copper Mill, founded 1602 by the Danish King Christian IV, was once one of the largest industrial plants in the Danish Kingdom. Driven by water power, the workers made buckets, kettles and candlesticks for everyday use and even produced ship- plates that protected the undersides of big wooden sailships against fouling and damage. Trading vessels from nearby Flensburg delivered the raw materials and transported the manufactured goods all over the world. A workers' settlement was built near the factory, which is now a listed building. On German Hands, the Copper Mill changed its former name „Kruså Kobbermølle“ to "Crusau Kupfer- und Messingfabrik". The factory was closed in 1962 and is now a cultural museum and monument of industrial history.