The Fasanenschlösschen was originally used for rearing pheasants. The pheasant rooms were located on the first floor of the castle and the pheasant master's apartment was on the upper floor. When the castle garden was redesigned into an English landscape garden in 1773, the building was also converted into a small castle. The pheasant parlors were converted into a representative hall, which is still largely in its original state with sea-green wall paint and classical elements today. 1866 saw the dissolution of the pheasantry, which at times housed more than 3,000 pheasants, so the hall in the castle was used as a school for princes in the summer months, and during the war in 1870 as a school for pheasants.