Bust of Constantius II, pearl-diademed, wearing crested and diademed helmet, cuirassed, facing front, holding spear diagonally over right shoulder in right hand and shield decorated with a horseman trampling an enemy in left hand., Roma, helmeted, draped, enthroned facing, and Constantinopolis, draped, enthroned left, head left, supporting a wreath inscribed VOT/XXX/MVLT/XXXX; Roma holding spear in left hand; Constantinopolis holding sceptre in left hand, her right foot on prow; between them, a palm., Superb solidus, extremely rare. Unfortunately damaged on the observe by the marks of an old mounting as jewellery. There are several marks on the whole, two on the legend at 9h, a large one on the emperor's right hand, and two on each side of the crest of his helmet. The edge also shows traces of the old mounting, at 12h and 3h, and more slightly at 6h. The reverse is completely intact and very well preserved, and was undoubtedly the visible face of the earlier jewellery. In the classical style of the period, showing the coexistence of the two capitals of the Roman Empire, Rome, the historic one, and Constantinople, newly founded by Constantine I ‘the Great’, the father of Constantius II. Minted in Arelate (Arles in France today), the solidi with the types of the cities issued by this mint are extremely rare, and for type 234 of the Roman Imperial Coinage, there are only around a dozen examples seen in sales over recent years and a single example in public collections (Göttingen, Germany). This solidus was probably struck to celebrate the emperor's 20-year reign (vicennalia), while he was residing in the city of Arelate, where he took up winter residence at the end of the summer of 353 after defeating the usurper Magnentius. On this occasion, he renamed the city Constantina, a name dropped in 340 after the death of his brother Constantine II, and made it an imperial city. RIC VIII Arelate 234; Cohen 112; Depeyrot 5/1., FL IVL CONSTANTIVS PERP AVG, GLORIA REI - PVBLICAE / VOT/XXX/MVLT/XXXX // KONS(TAN)