ConstantineConstantine became a pivotal figure in the historio-graphical tradition beginning shortly after his death. Eusebius of Caesarea composed a panegyrical biography, The Life of Constantine, which elevated him to the level of a prophet or saint. A counterreaction started with his pagan nephew, the emperor Julian (r. 361-363), whose critique was magnified by the late 4th-century pagan historian Eunapius and his early 6th-century epitomizer Zosimus. They criticized, inter alia, Constantine's confiscation of treasuries from pagan shrines and his family murders, in repentance for which, they argued, Constantine chose to convert. Late antique Christian writers joined the debate by attempting to counter these pagan detractions (esp. Sozomen), to supplement them with charges of Constantine's tendency toward Arianism (esp. Jerome), or, in the case of Arianizing historians, to claim the emperor as an ally (esp. Philostorgius).
Legends also appeared quickly, the first relating to Constantine's refashioning of the Holy Land. Although by the 350s Christians believed that the True Cross on which Christ was thought to have been crucified had been discovered, in 395 Ambrose of Milan first reported that Constantine's mother, Helena, was responsible for its excavation (De obitu Theodosii 43-47), and only a few years later Rufinus of Aquileia (Historia eremitica 10.7-8) offers a full narrative of the inventio crucis. These late 4th-century accounts spawned a series of more elaborate legends in Latin, Greek, and Syriac involving the revelation of the cross's whereabouts by a Jew named Judas, who converted and as bishop of Jerusalem took the name Cyriacus.