Mar Qardagh was a 4th-century Assyrian prince from the Sassanid Empire who converted from Zoroastrianism to Christianity. After being appointed as a regional governor due to his athletic reputation, he embraced the Christian faith following an encounter with Abdisho. This conversion led to his rejection by his noble family and a subsequent conflict with the Persian authorities. He eventually surrendered his military position to honor his religious convictions, leading to his execution.