Amiternum was an ancient Sabine city, then Roman city and later bishopric and Latin Catholic titular see in the central Abruzzo region of modern Italy, located 9 km (5.6 mi) from L'Aquila.

It lay at the point of junction of four roads: the Via Caecilia, the Via Claudia Nova and two branches of the Via Salaria.

[2] There are considerable remains of an amphitheatre and a theatre, all of which belong to the imperial period, while on the hill of the surrounding village of San Vittorino there are some Christian catacombs.

[3] The modern name of the locality, San Vittorino, recalls the martyr Victorinus, who is looked on as the first bishop of Amiternum, allegedly of the time of the persecution by Roman Emperor Nerva (AD 30-98), although other sources put the bishopric's foundation in ca.

Other bishops of Amiternum include Quodvultdeus, who encouraged the religious veneration of Victorinus by constructing his tomb, Castorius, who is mentioned by Pope Gregory I, Saint Cetteus, martyred by the Lombards in 597, and Leontius, a brother of Pope Stephen II.