Simon Bélyard was a French playwright of the second half of the 16th century associated with the city of Troyes.
In 1592, he wrote a tragedy, Le Guysien, whose subject was the execution of Henry I, Duke of Guise. In 1589, Pierre Matthieu had already written a play, La Guisiade, showing hostility towards Henry III of France.
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References
Simon Bélyard Wikipedia(Text) CC BY-SA