1333 The River Arno flooding caused massive damage in Florence as recorded by the Florentine chronicler Giovanni Villani.
1429 Joan of Arc liberated Saint-Pierre-le-Moûtier.
1501 Catherine of Aragon (later Henry VIII's first wife) met Arthur Tudor, Henry VIII's older brother – they would later marry.
1520 Christian II Crowned King of Sweden. Already king of Denmark and Norway, Christian conquered Sweden as well. But the subsequent massacre of his opponents led to a Swedish war of liberation, which was achieved a mere three years later.
1529 English Cardinal Thomas Wolsey was arrested. Wolsey's failure to secure the annulment for Henry VIII from Catherine of Aragon is widely perceived to have directly caused his downfall and arrest.