modern works distinguish Jupiter from Zeus. Theology Sources Marcus Terentius Varro and Verrius Flaccus were the main sources on the theology of Jupiter and archaic Roman religion in general. Varro was acquainted with the libri pontificum ("books of the Pontiffs") and their archaic classifications. On these two sources depend other ancient authorities, such as Ovid, Servius, Aulus Gellius, Macrobius, patristic texts, Dionysius of Halicarnassus and Plutarch. One of the most important sources which preserve the theology of Jupiter and other Roman deities is The City of God against the Pagans by Augustine of Hippo. Augustine's criticism of traditional Roman religion is based on Varro's lost work, Antiquitates Rerum Divinarum. Although a work of Christian apologetics, The City of God provides glimpses into Varro's theological system and authentic Roman theological lore in general. According to Augustine, Varro drew on the pontiff Mucius Scaevola's tripartite theology: The mythic theology of the poets (useful for the theatre) The physical theology of the philosophers (useful for understanding the natural world) The civil theology of the priests (useful for the state) Jovian theology Georg Wissowa stressed Jupiter's uniqueness as the only case among Indo-European religions in which the original god preserved his name, his identity and his prerogatives. In this view, Jupiter is the god of heaven and retains his identification with the sky among the Latin poets (his name is used as a synonym for "sky".) In this respect, he differs from his Greek equivalent Zeus (who is considered a personal god, warden and dispenser of skylight). His name reflects this idea; it is a derivative of the Indo-European word for "bright, shining sky". His residence is found atop the hills of Rome and of mountains in general; as a result, his cult is present in Rome and throughout Italy at upper elevations. Jupiter assumed atmospheric qualities; he is the wielder of lightning and the master of weather. However, Wissowa acknowledges that Jupiter is not merely a naturalistic, heavenly, supreme deity; he is in continual communication with man by means of thunder, lightning and the flight of birds (his auspices). Through his vigilant watch he is also the guardian of public oaths and compacts and the guarantor of good faith in the State cult. The Jovian cult was common to the Italic people under the names Iove, Diove (Latin) and Iuve, Diuve (Oscan, in Umbrian only Iuve, Iupater in the Iguvine Tables). Wissowa considered