In A.D. 326 one of the most unfortunate events in Roman history occurred.
That was when Crispus, the eldest son and promising heir of the Emperor Constantine I “the Great” (A.D. 307 to 337), was executed after having been condemned in a court of law. To merit that punishment he must have been convicted of something on the order of high treason, though details of the affair were as veiled then as they are today.
Few details of Crispus’ life are recorded in the historical works that survived the censorship of the Constantinian Era. The execution of Crispus was controversial, and astute historians of the day treated the subject in a cursory manner or passed it over altogether.
Crispus seems to have been born between about A.D. 300 and 305, when his grandfather Constantius I “Chlorus” (Caesar, A.D. 293 to 305) was one of the four men who ruled the Roman world. At that time Crispus’ father, Constantine, was serving in the court of the Emperor Diocletian (A.D. 284 to 305) or that of his deputy Galerius (Caesar, A.D. 293 to 305), but as yet had no imperial rank.
Little is known about Crispus’ mother Minervina, who was virtually scrubbed from the historical record. She is variously described as Constantine’s wife or concubine. Their relationship was played down after A.D. 307, the whirlwind year in which Constantine became emperor and married Fausta, the daughter of another emperor, Maximian (A.D. 285 to 310). In dynastic terms, this was Constantine’s first and only legitimate marriage.
Crispus spent most of his formative years in Germany since his father — by then emperor — had set up his court in Trier, a city not far from the northern border of the Roman Empire. Barbarian invasions in the region were commonplace in the early fourth century A.D., and it was important that an emperor or his associates were stationed nearby.
During those years in Germany, Crispus could observe the army and the government in great detail. By the time he was a teenager, his father already had entrusted him with serious responsibilities in overseeing affairs in the Western provinces. Crispus’ role became vital in A.D. 312, when his father began his relentless push eastward to defeat rival emperors and to gain control of the remainder of the empire.
Crispus was helpful along the way, keeping the Western provinces in order during his father’s absence. In 316 Crispus was rewarded with the subordinate rank of Caesar, a title he held until his death a decade later. His greatest achievement, however, was the defeat late in 324 of the much larger fleet of his father’s last rival, the Emperor Licinius I (A.D. 308 to 324). This was critical in allowing his father to defeat Licinius later in that same year.
As remarkable as Crispus’ achievements were in government and warfare, he clearly made some miscalculations in the realm of family politics, and was unable to defend himself against the hostility of others. Since the truth of the events surrounding his downfall are lost, we can only speculate as to what drove Constantine to order the execution of his eldest son.
In dynastic terms, Crispus’ illegitimacy ran two generations deep: not only was he the son of his father’s “concubine” Minervina, but he was the grandson of Helena, a future saint who reportedly had been a barmaid when she became involved with his grandfather Constantius I.