"Wenceslaus I (also Wenceslas, Venceslas, Wenzel, or Václav, often called Wenceslaus of Bohemia in chronicles) (Prague, 25 February 1337 – Luxembourg, 7 December 1383) was the ...
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first Duke of Luxembourg from 1354. He was the son of John the Blind, King of Bohemia, and Beatrice of Bourbon." - (en.wikipedia.org 29.09.2019)