Radical Hussite Jan Želivský was beheaded on this date in 1422.
1952 memorial plaque of Zelivsky in Prague
After the treacherous capture and execution of Jan Hus, the Hussite movement split between radical and moderate factions. The firebrand Zelivsky became the chief voice of the lower-class, radical Hussites and led the dramatic Defenestration of Prague wherein a Hussite mob pitched several Catholic city ministers out the window of the Prague town hall — triggering a revolution and 15 years of war.
Over the ensuing year, Zelivsky came to dominate politics in Prague. But he had to struggle for his power against both the external threat of Hapsburg armies, and the internal rivalry of moderate Hussites — and these factions did not scruple to deploy the executioner for mastery of Prague.
Zelivsky in the summer of 1421 mounted a coup against moderate Hussites who were negotiating with the Catholic nobility, and even executed some of those movement apostates. But power was wrested away from him in the ensuing months and he was arrested by surprise at a town meeting and secretly put to death.