November 4, 1333 The River Arno flooding caused massive damage in Florence
as recorded by the Florentine chronicler Giovanni Villani.
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.