isch be in ; ▁he ▁also ▁appointed ▁Franz ▁X aver ▁von ▁Zach ▁director ▁of ▁the ▁Goth a ▁Observ atory ▁established ▁in ▁ 1 7 8 7 . ▁ ▁Nevertheless , ▁when ▁the ▁last ▁du kes ▁Emil ▁August , ▁a ▁fer vent ▁adm ir er ▁of ▁the ▁rise ▁of ▁Napoleon , ▁and ▁his ▁brother ▁Frederick ▁IV ▁had ▁both ▁died ▁without ▁male ▁he irs , ▁the ▁house ▁of ▁Sax e - G oth a - Al ten burg ▁finally ▁became ▁ext inct ▁in ▁ 1 8 2 5 ▁and ▁quar rel s ▁arose ▁between ▁the ▁three ▁remaining ▁Ernest ine ▁lines ▁about ▁the ▁succession . ▁As ▁a ▁result ▁of ▁an ▁arbitr ation ▁issued ▁by ▁King ▁Frederick ▁August us ▁I ▁of ▁Sax ony ▁in ▁ 1 8 2 6 , ▁the ▁Ernest ine ▁duch ies ▁were ▁re arr anged ▁and ▁Sax e - G oth a - Al ten burg ▁was ▁again ▁split : ▁ ▁Sax e - G oth a ▁passed ▁to ▁the ▁Duch y ▁of ▁Sax e - C ob urg - Sa alf eld , ▁which ▁had ▁to ▁c ede ▁Sax e - Sa alf eld ▁to ▁Sax e - Me ining en . ▁The ▁territ ories ▁constit uted ▁the ▁newly ▁created ▁Duch y ▁of ▁Sax e - C ob urg ▁and ▁Goth a . ▁Sax e - Al ten burg ▁was ▁given ▁to ▁the ▁Duke ▁of ▁Sax e - H ild burg hausen , ▁who ▁in ▁turn ▁passed ▁his ▁own ▁domain ▁to ▁Sax e - Me ining en ▁and ▁again ▁assumed ▁the ▁title