The Hellenistic age can be dated from roughly the time of Alexander the Great (356-323 BCE) to the fourth century CE, during which The Roman Emperor Constantine converted to Christianity in 313, the imperial decrees of Theodosius I founded the orthodox Christian state in 380, and paganism was prohibited in 391. The world became much more cosmopolitan in Hellenistic times and many different people suddenly became aware of each other, causing syncretistic religions and cults to arise, where universal (rather than local) gods and goddesses were worshiped. The Ptolemaic cosmological revolution occurred in this period as well, leading to a completely revised understanding of the place of the human being in the world. Rather than viewing the world in terms of a threefold hierarchy of heaven, earth, and the underworld, Ptolomy proposed that the earth was in the center of a solar system with seven separate planets orbiting the earth and a distant realm of fixed stars. This extension of the celestial realm was reflected in religious thought as the gods became further removed, not residing in terrestrial realms any longer, but inhabiting a more remote celestial abode. Many cults and new religions arose during this time period, with similar features (e.g., born of virgins, turning water into wine). Christianity was just one among many, though with perhaps slightly more creditability than some of the other new cults, because Christianity drew upon ancient Jewish tradition to substantiate itself. In the end, for whatever reason, Christianity triumphed over the other religions that emerged in this time period, and we've all but forgotten that the others even existed.