In Greek mythology, Atlas is a Titan condemned to hold up the heavens or sky for eternity after the Titanomachy. The Titanomachy was a ten-year series of battles fought in Ancient Thessaly, consisting of most of the Titans (the older generation of gods, based on Mount Othrys) fighting against the Olympians (the younger generations, who would come to reign on Mount Olympus) and their allies.

Atlas was the son of the Titan Iapetus and the Oceanid Asia or Clymene. He was a brother of Epimetheus and Prometheus. He had many children, mostly daughters, the Hesperides, the Hyades, the Pleiades, and the nymph Calypso who lived on the island Ogygia.

The term Atlas has been used to describe a collection of maps since the 16th century when Flemish geographer Gerardus Mercator published his work in honour of the mythological Titan.

According to the ancient Greek poet Hesiod, Atlas stood at the ends of the earth in extreme west. Later, he became commonly identified with the Atlas Mountains in northwest Africa and was said to be the first King of Mauretania (modern-day Morocco and west Algeria, not to be confused with the modern-day country of Mauritania). Atlas was said to have been skilled in philosophy, mathematics, and astronomy. In antiquity, he was credited with inventing the first celestial sphere. In some texts, he is even credited with the invention of astronomy itself.

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