Constantius Gallus
Flavius Claudius Constantius Gallus (c. 325 – 354) was a Roman imperial figure who served as Caesar of the eastern provinces from 351 to 354 under his cousin, Emperor Constantius II.[1] Born in Etruria as the son of Julius Constantius and Galla, he was half-brother to the future emperor Julian and survived the purges following Constantine I's death in 337 due to illness.[1] Appointed Caesar on 15 March 351 at Sirmium amid the civil war against the usurper Magnentius, Gallus—renamed Constantius upon elevation—governed from Antioch, where he suppressed a Jewish revolt in Palestine around 351/352 and managed grain shortages through severe measures against officials.[1][2] His rule, however, drew widespread complaints for tyrannical excesses, including arbitrary executions of provincial leaders and senators, as detailed by the historian Ammianus Marcellinus, who portrays him as impulsive and cruel under the influence of his wife Constantina, sister of Constantius II.[2] Recalled to the emperor's court in 354 on treason charges following trials in Antioch, Gallus was arrested en route, confined near Pola, and beheaded after Constantina's death removed his protector.[1][2]