Callisto is a beautiful girl in ancient Greek mythology and the origin of the constellation Ursa Major in Greek mythology. Among the Ningfu maids of the hunting goddess Artemis (also known as Diana), she is the most touching.

In ancient Greek mythology, a character who, due to the jealousy of Hera, transformed his mother Callisto into a female bear. 15 years later, while hunting, the adult Arcus saw his mother - a female bear pouncing on him. Arcus didn't know that the female bear was his mother, so he raised his spear and stabbed it. Fortunately, Zeus, who was patrolling in the sky, saw this scene. He couldn't bear to see the tragedy happen and turned Arcus into a little bear. As a result, Arcus recognized his mother, and Zeus raised the big bear and the little bear to the sky, becoming Ursa Major and Ursa Minor.

Calisto was the daughter of King Lycaon, who swore from a young age to maintain her chastity, not to marry men, and to unite with the goddess Artemis. Therefore, she followed the goddess and Artemis greatly favored this beautiful mortal woman.
She doesn't wander by the stream all day like other elves, strolling in the garden, reciting poetry and poetry, singing and dancing lightly. She always wears hunting clothes, carries a divine bow on her shoulders, holds a golden spear, and follows Artemis closely, chasing wild beasts in the high mountains and dense forests.
One day, Callisto was resting in the forest when he ran into the divine king Zeus on a tour of the human world. As soon as Zeus saw the beautiful Callisto, his old habit recurred, and his spring heart couldn't help but ripple. So Zeus transformed into the form of Artemis, approaching Callisto. Callisto, who was unaware of this, was very happy to see the goddess arrive and stepped forward to welcome her.
When Artemis (Zeus) kissed her, she realized that the person in front of her was not her mistress, but it was too late. Shortly thereafter, Calisto discovered that he was pregnant. In order not to be discovered by Artemis, she carefully covered her gradually bulging belly. However, paper could not contain fire. Artemis quickly discovered this secret, and she was furious. In a fit of rage, she expelled the innocent Calisto.

Poor Calisto was helpless and could only wander in the forest, eventually giving birth to a son named Arcas. In another sense, Alcas was also the illegitimate son of Zeus, which caught the attention of Zeus's wife Hera. Hera, burning with jealousy, poured all her anger on Callisto and turned her into a female bear. Callisto, who had become a mother bear, was unable to continue taking care of his young son Alcas. Therefore, Callisto's father, Alcas's maternal grandfather, Lucaon, adopted this little boy.
After Lucaon's death, Alcas became the new king. One day, Alcas was hunting in the forest when he saw a female bear hovering in front of him. Without knowing where to go, he arched and was about to kill the female bear. This female bear was transformed by Calisto, who recognized her son from a distance and welcomed him despite the danger, showing extreme excitement. At this critical moment, the divine king Zeus saw this scene in the sky and remembered that period of time. He couldn't bear to see the tragedy of human relationships happen. Therefore, Zeus quickly transformed these two people into constellations and ascended into the universe. Calisto became the constellation Ursa Major, while her son Arcturus became the brightest Arcturus in the Herdsman constellation, meaning the protector of bears.

Jupiter and Callisto is a world-renowned oil painting created by French painter Boucher in 1744, depicting mythological themes of female beauty.
This oil painting depicting the mythological theme of female beauty can serve as a textbook for composition. Jupiter (Zeus in Greek mythology) fell in love with Lycaon, the daughter of the Arcadian king, Nymphus (also known as Callisto, the goddess of mountains, forests, and water), who was born with unparalleled beauty. In order to get close to her, Jupiter became the goddess Diana (Artemis in Greek mythology) and came into contact with her. In the painting, Jupiter transformed into Diana and played with the beautiful woman Callisto. Diana is the goddess of the moon and hunting, with a crescent shaped headdress on her head and prey and bows and arrows painted on her feet. Calisto exposed his left chest, with delicate and fair skin and intricate pleats on his clothes, creating a strong aesthetic. The overall composition is a pleasing and stable triangle: a pair of beautiful women, intimate on the ground in the wilderness, not like they are on an outing, but like sitting on a luxurious court sofa. This kind of decoration and exaggerated atmosphere were transformed by several angels on the trees and on the ground. Some of these angel figures are flying and perching on branches, while the other is crouching at Diana's knee. Fantasy and embellishment are the main characteristics of Rococo oil painting.