Siege of Aleppo
637 CE.
Shown on the map at 36.198°, 37.163°.
The siege of Aleppo, the Byzantine stronghold and one of few remaining Byzantine castles in the northern Levant after the decisive Battle of Yarmouk, was laid between August and October 637.
Text from the Wikipedia article Siege of Aleppo (637), licensed CC BY-SA 4.0.