"Henry of Anhalt-Köthen (30 July 1778, Schloss Pless – 23 November 1847, Köthen) was a German prince of the House of Ascania, ruler of the non-sovereign principality of ...
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Anhalt-Pless and the last ruler of the duchy of Anhalt-Köthen." - (en.wikipedia.org 30.01.2020)