Duchy of Saxe-Gotha-Altenburg Herzogtum Sachsen-Gotha-Altenburg (German) | |||||||||||||
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| 1672–1826 | |||||||||||||
 Flag
 Coat of arms
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.svg) Territories of Saxe-Gotha-Altenburg within the Ernestine duchies of Thuringia, before 1826 | |||||||||||||
| Status | State of the Holy Roman Empire, State of the Confederation of the Rhine, State of the German Confederation | ||||||||||||
| Capital | Gotha | ||||||||||||
| Government | Duchy | ||||||||||||
| Duke | |||||||||||||
• 1680–1691 | Frederick I (first) | ||||||||||||
• 1822–1825 | Frederick IV (last) | ||||||||||||
| Historical era | Early modern Europe | ||||||||||||
| 1672 | |||||||||||||
• Duchy established | 1672 | ||||||||||||
• Partitioned between Saxe-Coburg-Saalfeld and Saxe-Hildburghausen | 1826 | ||||||||||||
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Saxe-Gotha-Altenburg (German: Sachsen-Gotha-Altenburg) was a duchy ruled by the Ernestine branch of the House of Wettin in today's Thuringia, Germany. The extinction of the line in 1825 led to a major re-organisation of the Thuringian states.