Siege of Petra
541 CE.
Shown on the map at 41.768°, 41.753°.
The siege of Petra took place in 541 when the Sasanian Empire, under King of Kings Khosrow I, besieged the town of Petra in Lazica, held by the Eastern Roman (Byzantine) Empire. The Sasanians successfully captured the fortress.
Text from the Wikipedia article Siege of Petra (541), licensed CC BY-SA 4.0.