Which son of Sophia of Hanover ruled part of the Holy Roman Empire?
George I of Great Britain George I (George Louis; German: "Georg Ludwig" ; 28 May 1660 – 11 June 1727) was King of Great Britain and Ireland from 1 August 1714 until his death, and ruler of the Duchy and Electorate of Brunswick-Lüneburg (Hanover) in the Holy Roman Empire from 1698.
Electorate of Saxony The Electorate of Saxony (German: "" , also "Kursachsen "), sometimes referred to as Upper Saxony, was a State of the Holy Roman Empire established when Emperor Charles IV raised the Ascanian duchy of Saxe-Wittenberg to the status of an Electorate by the Golden Bull of 1356. Upon the extinction of the House of Ascania, it was enfeoffed to the Margraves of Meissen from the Wettin dynasty in 1423, who moved the residence up the Elbe river to Dresden. After the Empire's dissolution in 1806, the Wettin electors raised Saxony to a kingdom.