Schloss Holzheim is a former hunting seat of the ruling family of Hesse-Kassel, located in the village of in the German state of Hesse, approximately south of Kassel. The hunting lodge was built between 1732 and 1735 under Frederick I, King of Sweden and also Landgrave of Hesse-Kassel, in baroque style on the medieval foundation walls (from 1183) of the former manor house of the local noble families Von Holzheim and Von Romrod. Frederick's father, Landgrave Charles I, Landgrave of Hesse-Kassel had often come here for hunting. Frederick's brother and governor, Prince William (from 1751 William VIII, Landgrave of Hesse-Kassel), liked to be here as well because of the rich game population of the forest areas around the princely estate.
The building is surrounded by the remains of a Baroque garden (Schlossgarten, or "castle garden"), where many rare and exotic plants grow, including ancient roses, rhododendrons, and trees. The showpiece of the baroque garden is a more-than-350-year-old large-leaved lime (Tilia platyphyllos), called "Landgrave's lime".
Schloss Holzheim is a protected national historical monument.