"The Order of the Black Eagle (German: Hoher Orden vom Schwarzen Adler) was the highest order of chivalry in the Kingdom of Prussia. The order was ...
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founded on 17 January 1701 by Elector Friedrich III of Brandenburg (who became Friedrich I, King in Prussia, the following day). In his Dutch exile after World War I, deposed Emperor Wilhelm II continued to award the order to his family. He made his second wife, Princess Hermine Reuss of Greiz, a Lady in the Order of the Black Eagle." - (en.wikipedia.org 12.11.2019)
