▁building ▁served ▁as ▁an ▁Observ atory . ▁It ▁became ▁a ▁residence , ▁and ▁then ▁part ▁of ▁Belle vue ▁Castle , ▁which ▁was ▁later ▁destroyed . ▁Today ▁the ▁building ▁houses ▁a ▁museum ▁devoted ▁to ▁the ▁Brothers ▁Gr imm . ▁ ▁Location ▁ ▁Belle vue ▁Palace ▁is ▁near ▁the ▁center ▁of ▁K ass el , ▁west ▁of ▁the ▁Ful de ▁River . ▁It ▁is ▁next ▁to ▁the ▁Neue ▁Galerie , ▁an ▁art ▁museum ▁founded ▁in ▁ 1 9 7 6 ▁in ▁an ▁ 1 8 7 4 ▁ne o - class ical ▁building . ▁Belle vue ▁Palace ▁was ▁ere cted ▁in ▁ 1 7 1 4 ▁by ▁the ▁French ▁architect ▁and ▁H ug uen ot ▁refuge e ▁Paul ▁du ▁Ry ▁as ▁an ▁observ atory ▁for ▁Charles ▁I ▁( 1 6 5 4 – 1 7 3 0 ), ▁Land gra ve ▁of ▁H esse - K ass el . ▁ ▁History ▁From ▁about ▁ 1 7 2 5 ▁on , ▁the ▁palace ▁was ▁used ▁as ▁a ▁residence ▁for ▁members ▁of ▁the ▁Land gra ve ' s ▁court , ▁such ▁as ▁his ▁mist ress ▁Barbara ▁Christ ine ▁von ▁Bern hold ▁( 1 6 9 0 – 1 7 5 6 ). ▁Prince ▁Frederick ▁II ▁( 1 7 2 0 – 1 7 8 5 ), ▁Land gra ve ▁from ▁ 1 7 6 0 ▁on , ▁married ▁Mary , ▁daughter ▁of ▁King ▁George ▁II ▁of ▁England . ▁He ▁had ▁the ▁palace ▁surrounded ▁by ▁an ▁Ang lo - Ch inese ▁garden , ▁the ▁first ▁such ▁garden ▁on