Siege of Calatayud
1120 CE.
Shown on the map at 41.350°, -1.633°.
The Siege of Calatayud occurred in 1120 when Alfonso the Battler in conjunction with William IX of Aquitaine successfully besieged and captured the Amoravid city of Calatayud in the former Taifa of Zaragoza.
Text from the Wikipedia article Siege of Calatayud, licensed CC BY-SA 4.0.