The school's main building is in Louisenlund Castle, which was built by Hermann von Motz between 1772 and 1776 for Landgrave Charles of Hesse as a gift for his wife, Princess Louise of Denmark, the daughter of King Frederick V of Denmark.
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Advised by Kurt Hahn, in 1949 Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg decided to build a boarding school on the grounds and established the Louisenlund Foundation.