Crispus, born in the year three hundred and three, was the eldest son of the Roman emperor Constantine I and played a significant role in the political and military landscape of his time. As a junior colleague, or caesar, Crispus served from March three hundred and seventeen until his tragic execution by his father in three hundred and twenty-six. He was the grandson of the augustus Constantius I and the elder half-brother of the future augustus Constantine II.
His political career was marked by his co-rule with Constantine II and his cousin Licinius II at Serdica, a settlement that concluded the Cibalensean War against Licinius I. Crispus governed from Augusta Treverorum, present-day Trier in Roman Gaul, between three hundred and eighteen and three hundred and twenty-three. Notably, he achieved a significant military victory by defeating the navy of Licinius I at the Battle of the Hellespont in three hundred and twenty-four, which, alongside his father's land victory at the Battle of Chrysopolis, led to the resignation of Licinius and solidified the Constantinian dynasty's control over the empire.
Educated by the renowned Late Latin historian Lactantius, Crispus was also honored with the title princeps iuventutis, or