Diana (mythology) influence of Greek and Etruscan religion. By the 3rd century BCE, Diana is found listed among the twelve major gods of the Roman pantheon by the poet Ennius. Though the Capitoline Triad were the primary state gods of Rome, early Roman myth did not assign a strict hierarchy to the gods the way Greek mythology did, though the Greek hierarchy would eventually be adopted by Roman religion as well. Once Greek influence had caused Diana to be considered identical to the Greek goddess Artemis, Diana acquired Artemis' physical description, attributes, and variants of her myths as well. Like Artemis, Diana
Artemis placed Callisto the bear into the heavens, thus the origin of Callisto the Bear as a constellation. Some stories say that he placed both Arcas and Callisto into the heavens as bears, forming the Ursa Minor and Ursa Major constellations. Artemis punished Agamemnon after he killed a sacred stag in a sacred grove and boasted that he was a better hunter than the goddess. When the Greek fleet was preparing at Aulis to depart for Troy to begin the Trojan War, Artemis becalmed the winds. The seer Calchas advised Agamemnon that the only way to appease Artemis was to sacrifice