Events from the year 1523 in France.
Incumbents Monarch – Francis I
Events June 8 -King Francis I bans the dispatch of money from the French court to Rome and expels the papal nuncio. Charles III, Duke of Bourbon, plotted against King Francis I allaying with the Habsburgs. The plot ultimately failed, and Charles fled France.
Birth April 5 - Blaise de Vigenère, French diplomat, translator and the creator of the Vigenère cipher.(d.1596) June 5- Margaret of Valois, Daughter of king Francis I, Duchess of Berry and Duchess of Savoy by marriage. (d.1574) September 22- Charles de Bourbon French nobleman and Archbishop of Rouen (d.1590)
Deaths August 8- Jean Vallière, a French friar who was the first protestant executed on a charge of heresy in France.
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