"John Günther I of Schwarzburg-Sondershausen (also known as Hans Günther or Johann Günther; 20 December 1532 in Sondershausen – 28 October 1586 in Arnstadt) was the ...
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co-ruler of Schwarzburg from 1552 until 1571 and the sole ruler Schwarzburg-Sondershausen from 1571 until his death. He is regarded as the progenitor of the line Schwarzburg-Sondershausen." - (en.wikipedia.org 12.01.2020)
