Trenthorst Manor

Since then, Trenthorst, first documented in 1372 as an endowment for a vicarage at St. Johann auf dem Sande and transferred to private ownership in 1529, and Wulmenau were connected. In 1594, Gottschalk von Stiten placed them under the protection of the Lübeck Council. As he died childless, his sister Margareta and her husband Joachim Wetken, the son of Hamburg mayor Hermann Wetken, became owners. Emperor Rudolf II confirmed the ownership in 1608, and in 1660 Thomas Wetken was elevated to imperial nobility.

After several changes of ownership in the 18th century, Trenthorst was acquired by Henning von Rumohr in 1778. Henning Heinrich von Rumohr, the elder brother of Carl Friedrich von Rumohr, took over Trenthorst in 1804. Through the marriage of his daughter Friederike, Privy Councillor Gustav Poel became the owner of Trenthorst. After further changes of ownership, Friedrich Bölck took over Trenthorst in 1928. He temporarily made the manor house, renovated in 1911, available to Paul von Schoenaich and the German Peace Society, which had its headquarters there until its prohibition by the National Socialists and held its last general meeting in 1932. Bölck had to sell, and Trenthorst was acquired by Philipp F. Reemtsma in 1936. Subsequently, the large landholding was divided and largely sold off.

In 1955, the Max Planck Institute for Animal Breeding took over the operation; today, the Institute for Organic Farming is located here, since January 1, 2008, one of fifteen institutes of the Johann Heinrich von Thünen Institute.