Siege of Avignon
1226 CE.
Shown on the map at 43.949°, 4.808°.
The siege of Avignon was the principal military action of the Albigensian Crusade of 1226. King Louis VIII of France besieged the town of Avignon, which lay within the Holy Roman Empire, from 10 June until 9 September, when it surrendered on terms.
Text from the Wikipedia article Siege of Avignon (1226), licensed CC BY-SA 4.0.