TYPE Byzantine Empire, Justin I (518-527 AD), bronze pentanummium, Constantinople mint DESCRIPTION . Obv: Diademed emperor's bust to right, Latin legend [D N IVSTI]NVS PP AVG Rev: Christogram (Chi-Rho sign) with E (denomination) to right, and officina alpha to left REFERENCE: SB 75 GRADING: VG+ / F, dark patina ORDER INFO: B1744, $18 A decent example of the famous Christian monogram, with the superimposed Greek letter "chi" and "ro" (HR) - the starting letters of Christ's name. According to legend, Constantine the Great had a vision of Christ prior to the battle of Milvian Bridge, whereby he was instructed to put this sign on his military standards, which so ornamented came to be known as labara. The battle, fought against rival Maxentius on Oct. 28, 312 AD, was a decisive victory for Constantine which opened the door for his uncontested rule, an eventaully led to the triumph of Christianity.