The written sources for the early periods of Iberia's history are mostly medieval Georgian chronicles, that modern scholarship interpret as a semi-legendary narrative. One such chronicle, "Moktsevay Kartlisay" (“Conversion of Kartli”) mentions that a ruler named Azo and his people came from Arian-Kartli – the initial home of the proto-Iberians, which had been under Achaemenid rule until the fall of the Persian Empire – and settled on the site where Mtskheta was to be founded. Another Georgian chronicle, "Kartlis Tskhovreba" (“History of Kartli”) claims Azo to be an officer of Alexander’s, who massacred a local ruling family and conquered the area, until being defeated at the end of the 4th century BC by Prince Pharnavaz, at that time a local chief.