Established at the beginning of the 18th century as the Hortus Conclusus (wall in the north and east preserved) of the Favorite pleasure palace (Friedamadolphsburg); 1849–1853 redesign of the baroque axial layout as an English landscape garden, with expansion from 2.5 to 7.5 hectares. Design by Peter Joseph Lenné (huge work: Potsdam, Brühl, Elisengarten + hospital garden [Casino] Aachen, Bad Oeynhausen, etc.), At the same time, renovation of the Favorite pleasure palace in the ›Neues Palais‹ 1850–1854, today the University of Music.
Basic structures with valuable trees, open meadow spaces and visual relationships, fountains and water features and remnants of the baroque gardens have been preserved.
Fountains created in 1855, turbine with a 2 m drop at the end of Neustadt, fed by Friedrichsthaler Canal, elevated reservoir, 25 meters in altitude, 8 water features, of which the swan pond, frog fountain, dolphin fountain, lily pond with fountain, large cascade grotto on the Alter Postweg (small cascade grotto at Water lily pond still visible) Storage pond 1000 cbm outside.
Exotic trees (tulip tree, river cedar, 2 sequoias that Leopold III brought back from a trip to Italy in 1858). Several tree halls made from local deciduous trees (English oak, linden, sycamore maple), planted roundels (›12 Apostles‹).
1965–1967 instead of an older rose garden in the vicinity of the new concert hall (Aulabau), a rose garden based on a design by Hermann Mattern / Kassel (from 1948 professor at the Kassel Art Academy, 1955 BUGA Kassel). Strictly architecturally designed, multi-level terrace system with wide stairs as an extension of the concert hall to the outside (also materially in the exposed concrete walls and the small paved floor, which extend from the inside to the outside).