 The son and successor of Guaram I of Iberia, Stephen reversed his father’s pro-Byzantine politics to pro-Iranian and, through loyalty to his Sassanid suzerains, succeeded in reuniting Iberia under his sway.He made Tbilisi his capital and defended it with a Georgian-Iranian force when the Byzantine emperor Heraclius, in alliance with the Khazars, attacked Iberia in 626 (see Byzantine–Sassanid War of 602–628).Stephen was taken captive in the fighting and Heraclius had him flayed alive.