That ruler of this name send the generals Mundus and Narses to quell the Nika Revolts and employed John the Cappadocian and Tribonian to compile a certain codex.
One ruler of this name suffered a blistering defeat against the forces of Muhammad ibn Marwan after 20,000 Slavs defected at the Battle of Sebastopolis. That ruler of this name convoked the Quinisext Council to stamp out pagan practices and ordered Pope Sergius I arrested. One ruler of this name had his armies defeated by a force under Azarethes at the Battle of Callinicum, part of the Iberian wars. The banker Peter Barsymes was employed by that ruler of this name, who was challenged by an usurper named (*) Hypatius in an incident where the "blue" and "green" factions united against him. That ruler of this name send the generals Mundus and Narses to quell the Nika Revolts and employed John the Cappadocian and Tribonian to compile a certain codex. For 10 points, name this name shared by the last ruler of the Heraclian Dynasty and the husband of Theodora who created a namesake Law Code as Byzantine Emperor.
One ruler of this name suffered a blistering defeat against the forces of Muhammad ibn Marwan after 20,000 Slavs defected at the Battle of Sebastopolis.
Justinian [do NOT accept "Justin" as that was a different name]