What is Saxe-Gotha-Altenburg?
{{Infobox Former Country |native_name = ''Herzogtum Sachsen-Gotha-Altenburg'' |conventional_long_name = Duchy of Saxe-Gotha-Altenburg |common_name = Saxe-Gotha-Altenburg | |continent = Europe |region = Central Europe |country = Germany |era = Middle Ages |status = Vassal |status_text = [[States of the Holy Roman Empire|State]] of the [[Holy Roman Empire]],<br> [[States of the Confederation of the Rhine|State]] of the [[Confederation of the Rhine]],<br> [[States of the German Confederation|State]] of the [[German Confederation]] |empire = Holy Roman Empire |government_type = Principality | |year_start = 1672 |year_end = 1825 | |event_start = [[Personal union|Union]] of [[Saxe-Gotha]]<br>&nbsp;&nbsp;&nbsp;&nbsp;and [[Saxe-Altenburg]] |date_start = &nbsp;<br>[[1672]] |event_end = Partitioned between<br>&nbsp;&nbsp;&nbsp;&nbsp;[[Saxe-Coburg-Saalfeld]] and <br>&nbsp;&nbsp;&nbsp;&nbsp;[[Saxe-Hildburghausen]] |date_end = &nbsp;<br>&nbsp;<br>[[1825]] | |p1 = Saxe-Gotha |image_p1 = [[Image:Sin escudo.svg|20px|Image missing]] |p2 = Saxe-Altenburg |image_p2 = [[Image:Sin escudo.svg|20px|Image missing]] |s1 = Saxe-Coburg-Saalfeld |image_s1 = [[Image:Sin escudo.svg|20px|Image missing]] |s2 = Saxe-Hildburghausen |image_s2 = [[Image:Sin escudo.svg|20px|Image missing]] | |image_flag = <!--- Default: Flag of {{{common_name}}}.svg ---> |image_coat = <!--- Default: Coat of arms of {{{common_name}}}.svg ---> | |image_map = SajoniaGothaAltenburg.jpg |image_map_caption = Saxe-Gotha-Altenburg, shown within the other [[Ernestine duchies]], [[1826]] | |capital = }} '''Saxe-Gotha-Altenburg''' ({{lang-de|Sachsen-Gotha-Altenburg}}) was a country in what is today [[Thuringia]], [[Germany]]. It was formed in [[1672]] when [[Frederick Wilhelm III, Duke of Saxe-Altenburg|Frederick Wilhelm III]], the last duke of [[Saxe-Altenburg]] died and [[Ernest I, Duke of Saxe-Gotha|Ernest I]], Duke of [[Saxe-Gotha]] (who had married Frederick Wilhelm's cousin, [[Elisabeth Sophie of Saxe-Altenburg|Elisabeth Sophie]]) inherited his possessions. The duchy w