One day, in the far-off sixth century, a youthful deacon of the Roman Church walked into the slave-market of Rome, situated at one extremity of the ancient Forum. Gregory, his name; his origin from an ancient noble family, whose genealogy could be traced back to the days of the early Cæsars. A youth was this of imperial powers of mind, one who, had he lived when Rome was mistress of the physical world, might have become emperor; but who, living when Rome had risen to lordship over the spiritual world, became pope,--the famous Gregory the Great. In the Forum the young deacon saw that which touched.