Crusaders massacred the town of Béziers — "kill them all"
On this day · 22 July 1209
On a July morning in 1209, a holy war against heretics opened with the slaughter of an entire town that had refused to surrender 222 Cathars.
On 22 July 1209, the opening campaign of the Albigensian Crusade reached the southern French town of Béziers. The crusaders, marching against the Cathar heresy at the urging of Pope Innocent III, demanded the town hand over 222 named heretics. Béziers refused.
Within hours the walls were breached. The attackers spared no one — Catholic or Cathar, man, woman, child, priest — and the chroniclers put the dead at roughly 20,000, with much of the town left in ruins.
Asked how to tell the faithful from the heretics, the papal legate Arnaud Amalric is said to have answered, “Kill them all; God will know his own.”
That chilling line survives only in a monk’s account written years later and is probably apocryphal, yet it captured how contemporaries understood the day. Béziers became the crusade’s grim opening note — proof that a war waged for souls could be measured in bodies, and a warning to every town that lay ahead.
Sources & references
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