Originally commissioned in 1654 by Pope Innocent X to be a free-standing statue in the Basilica of St. Peter, Bernini's "Vision of Constantine" was later incorporated into Bernini's Scala Regia. The marble statue represents – in typical Bernini dramatic fashion – the miraculous vision of Constantine who was shown a cross by an angel and told "In hoc signo vinces" ("In this sign, you will conquer") on the eve of the momentous Battle of the Milvian Bridge.