▁fell ▁into ▁dis rep air . ▁He ▁retired ▁in ▁ 1 7 3 4 ▁( poss ibly ▁suffering ▁from ▁sen ility ) ▁and ▁died ▁the ▁following ▁year . ▁ ▁Work ▁His ▁best - known ▁works ▁include : ▁The ▁Schloss ▁Sal zd ahl um ▁( B eg un ▁by ▁La uter bach ▁in ▁ 1 6 8 8 : ▁completed ▁by ▁K orb ▁in ▁ 1 6 9 7 ). ▁It ▁was ▁here ▁that ▁Frederick ▁the ▁Great ▁married ▁Elisabeth ▁Christ ine ▁of ▁Brun sw ick - W olf en b ütt el - B ever n ▁in ▁ 1 7 3 3 . ▁It ▁was ▁dis m ant led ▁in ▁ 1 8 1 3 . ▁Pie ces ▁of ▁it ▁may ▁still ▁be ▁seen ▁at ▁various ▁sites ▁throughout ▁the ▁city . ▁ ▁The ▁original ▁Brun sw ick ▁Palace ▁( B eg un ▁by ▁K orb ▁in ▁ 1 7 1 8 , ▁but ▁not ▁finished ▁until ▁after ▁his ▁death ). ▁It ▁was ▁destroyed ▁by ▁fire ▁in ▁ 1 8 3 0 ▁and ▁re built ▁by ▁Carl ▁The odor ▁Ott mer . ▁Ren ov ation ▁of ▁the ▁Schloss ▁Bl ank enburg . ▁K orb ▁was ▁commission ed ▁to ▁convert ▁the ▁medieval ▁castle ▁into ▁a ▁Bar o que - style ▁residence . ▁The ▁" B ibli othe ks rot unde " ▁at ▁the ▁Herzog ▁August ▁Library ▁in ▁Wolf en b ütt el . ▁It ▁was ▁designed ▁to ▁specific ations ▁by ▁Le ib n iz , ▁the ▁Chief ▁L ibr arian ▁from ▁ 1 6 9 0