The Battle of White Mountain (Czech: Bitva na Bl hoe; German: Schlacht am Weien Berg) was an important battle in the early stages of the Thirty Years' War. It led to the defeat of the Bohemian Revolt and ensured Habsburg control for the next three hundred years.

It was fought on 8 November 1620. An army of 21,000 Bohemians and mercenaries under Christian of Anhalt was defeated by 23,000 men of the combined armies of Ferdinand II, Holy Roman Emperor, led by Charles Bonaventure de Longueval, Count of Bucquoy, and the German Catholic League under Maximilian I, Elector of Bavaria and Johann Tserclaes, Count of Tilly, at Bl Hora ("White Mountain") near Prague. Bohemian casualties were not severe but their morale collapsed and Imperial forces occupied Prague the next day.

Old Town Square execution (Czech: Staroměstská exekuce) was the execution of 27 Bohemian leaders (three noblemen, seven knights and 17 burghers) of the Bohemian Revolt by the Austrian House of Habsburg that took place on 21 June 1621 at the Old Town Square in Prague.After the Prague Defenestration in 1618 and subsequent Protestant uprising of the Bohemian estates against the Catholic Habsburgs resulted in Thirty Years' War and a final defeat in the Battle of White Mountain, Habsburgs took their revenge and executed some of the key leaders of the uprising, although with some others the punishment was reduced and some were pardoned.