325 CE
Constantius Gallus is born in Etruria.
337 CE
Constantius Gallus is one of the few relatives of Constantine the Great not purged after his death.
342 CE
Julian II and Constantius Gallus are transferred to Cappadocia after the death of Eusebius.
351 CE
March 15
March 15
Constantius II raises Constantius Gallus to Caesar and marries him to his sister Constantina. Constantius Gallus takes up residence in Antioch.
353 CE
Constantius Gallus raises a siege of Seleukia ad Kalykadnon by troops loyal to Shapur.
354 CE
Constantius Gallus is arrested by Constantius II and ordered put to death. He then reconsiders and orders Gallus spared, but the orders are delayed intentionally by Eusebius.