The "First Defenestration" of Prague, took place on July 30, 1419, marking the start of the Hussite Wars in Bohemia. Hussites, led by Jan Želivský, threw seven anti-Hussite magistrates from the New Town Hall windows, leading to a widespread revolt against Catholic authority and Royal power.
The 1419 defenestration is often confused with the second major defenestration which took place 200 years later in 1618, triggering the Thirty Years' War.