Sack of Thessalonica
904 CE.
Shown on the map at 40.650°, 22.900°.
The sack of Thessalonica was the capture and subsequent sack of the Byzantine city of Thessalonica by the Abbasid Caliphate and Egyptian Tulunid army in the year 904, led by Leo of Tripoli, a privateer and Muslim convert.
Text from the Wikipedia article Sack of Thessalonica (904), licensed CC BY-SA 4.0.