Hekster, Olivier. The city of Rome in late imperial ideology: The Tetrarchs, Maxentius, and Constantine. 1999. 32 pp.
Maxentius (AD 307-312). AV quaternio or medallion of 4-aurei (33mm, 21.12 gm, 1h). NGC MS 5/5 - 2/5, Fine Style, smoothing. Rome, ca. AD 308. IMP C M VAL MAXENTIVS P F AVG, bare head of Maxentius left / CONSERVA-TO-R VRBIS SVAE, Roma seated left on shield decorated with she-wolf and twins in the grotto of the Lupercal, Victory right on globe in right hand, grounded scepter in left; PR in exergue. Cohen -. Gnecchi -. RIC VI -, cf. 143-144 (aureus, this reverse type). Carson, A Treasure of Aurei and Multiples from the Mediterranean -, cf. 99 (aureus), 111 (binio, P*R exergual mark), 106-108 (this obverse die, different reverse types) = Carson, The Greatest Discovery of Roman Gold Pieces Since the Great Find of Arras, London Illustrated News, 14 November 1959, p. 650, fig. 1. Cf. Bastien Donativa, p. 71 note 6. Depeyrot p. 153. Extremely rare - only two examples known. Exceptionally strong strike with crisp details throughout on satiny surfaces.