According to Armenian tradition, St Abgar was the first Christian king of the 1st century, the son of the Parthian king Arshakunie Arsham. He was also called “senior man” as he was the wisest of all and a genius. Historian Moses of Khoronk, Assyrian historian Labubnia of Edessa, Greek historians Procopis and Yeusebius have all written of King Abgar. He built the city of Edessa on the site where the Armenian army protected the river crossing of the Euphrates from the Roman captain Casius. Later the king moved the royal palace and all idols from Nisibis to that city.