▁in ▁the ▁city . ▁ ▁Brandenburg - Pr uss ia ▁inherited ▁the ▁Arch bishop ric ▁of ▁Mag de burg ▁upon ▁the ▁death ▁of ▁August ▁of ▁Sax e - We issen f els ▁in ▁ 1 6 8 0 ▁and ▁re organ ized ▁the ▁sec ular ized ▁territory ▁as ▁the ▁Duch y ▁of ▁Mag de burg , ▁with ▁the ▁elect ors ▁of ▁Brandenburg ▁as ▁her edit ary ▁du kes . ▁The ▁Halle ▁region ▁( Sa alk re is ), ▁an ▁exc lave ▁of ▁the ▁province , ▁was ▁surrounded ▁by ▁the ▁Princi p ality ▁of ▁An halt , ▁the ▁County ▁of ▁Mans feld ▁( ac quired ▁by ▁Pr uss ia ▁in ▁ 1 7 9 0 ), ▁and ▁the ▁Elect or ate ▁of ▁Sax ony . ▁Again st ▁the ▁wishes ▁of ▁the ▁du chy ' s ▁Luther an ▁nob ility , ▁a ▁Cal vin ist ▁ch an cell or ▁was ▁appointed ▁to ▁govern ▁the ▁du chy . ▁Through ▁the ▁leadership ▁of ▁August ▁Hermann ▁Fran cke , ▁Halle ▁became ▁the ▁center ▁of ▁Piet ism ▁in ▁Brandenburg - Pr uss ia . ▁ ▁When ▁Elect or ▁Frederick ▁III ▁crown ed ▁himself ▁Frederick ▁I , ▁King ▁in ▁Pr uss ia , ▁in ▁ 1 7 0 1 , ▁the ▁Duch y ▁of ▁Mag de burg ▁became ▁part ▁of ▁the ▁new ▁Kingdom ▁of ▁Pr uss ia . ▁King ▁Frederick ▁William ▁I ' s ▁' all od ification ▁of ▁the ▁f ief s ', ▁or ▁efforts ▁to ▁modern ize ▁fe ud al ▁land ▁ownership ▁laws , ▁was ▁opposed ▁by ▁the