Gildas implied that a martyrium dedicated to Aaron and Julius was present by the sixth century, and a chapel dedicated to the saints certainly in existence near Caerleon by the ninth century, when it was recorded in a land charter. In the early twelfth century, the church passed into the property of the new Goldcliff Priory, and by 1142 had been renamed in dedication to St Alban as well as Julius and Aaron, reflecting the growing popularity of the former's cult. In later centuries, the chapel's associations with Julius and Aaron were forgotten. By the time of the sixteenth-century English Reformation, when the chapel was abandoned and perhaps converted into a barn, it was solely referred to as a Church of Saint Alban. The building fell into dilapidation and no longer survives.