1361 Prince Edward (Black Prince) married Joan Plantagenet. The "Fair Maid of Kent" was not considered the ideal wife for the heir of the English throne. Joan was the mother of Richard II.
1471 Battle of Brunkeberg in Stockholm: Sten Sture the Elder, the Regent of Sweden, with the help of farmers and miners, repelled an attack by Christian I, King of Denmark.
1631 During the Thirty Years War a Saxon army successfully entered Prague (capital and largest city of the Czech Republic). The war was fought primarily in what is now Germany, and at various points involved most countries in Europe, and was one of the most destructive conflicts in European history.