Siege of Petra
541
The siege of Petra took place in 541 when the Sasanian Empire, under King Khosrow I, besieged the town of Petra in Lazica, held by the Byzantine Empire, and it marked the opening stage of the Lazic War. The conflict began after Byzantine Emperor Justinian I, on the advice of one of his officials, John Tzibus, established a fortress at Petra and imposed a trade monopoly on the local population, causing resentment among the citizens of Lazica.