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The Duchy of Saxe-Jena was one of the Saxon Duchies held by the Ernestine line of the Wettin Dynasty. Established in 1672 for Bernhard, fourth son of Wilhelm, Duke of Saxe-Weimar, Saxe-Jena was reincorporated into Saxe-Weimar on the extinction of Bernhard's line in 1690.

Duchy of Saxe-Jena

Herzogtum Sachsen-Jena
1672–1690
Saxe-Jena, shown with the other Ernestine duchies
Saxe-Jena, shown with the other Ernestine duchies
StatusState of the Holy Roman Empire
CapitalJena
GovernmentPrincipality
Historical eraMiddle Ages
• Partitioned from
    Saxe-Weimar
 
1672 1672
• Ducal line extinct;
    restored to Saxe-Weimar
 
1690 1690
Preceded by
Succeeded by
Saxe-Weimar Saxe-Weimar
Saxe-Weimar Saxe-Weimar

Dukes of Saxe-JenaEdit

Reincorporated into Saxe-Weimar