"Charles II (10 October 1741 – 6 November 1816) was ruler of the state of Mecklenburg-Strelitz from 1794 until his death. Originally ruling as duke, he ...
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was raised to the rank of grand duke in 1815. Prior to succeeding to the throne he served as Governor of Hanover from 1776 to 1786." - (en.wikipedia.org 12.11.2019)