Osiris was one of the most important gods in the Ancient Egyptian religion. His figure evolved throughout the Egyptian history from being the king of the universe to being the lord of the underworld. He was the son of Geb, god of the earth, and Nut, goddess of the sky, both descendants of Ra, the creator god. Osiris came to the throne of the gods and of Egypt when he deposed Ra and took his place. He was the first pharaoh of Egypt according to the narrations of the mythical history of this State. The Egyptians considered that their civilization had begun from the reign of Osiris. He was the lord of gods and mortals, with whom he behaved benevolently and justly. He was a civilizing, wise and kind god. He taught the Egyptians agriculture, weaving, and music. Osiris was considered to have come into the world to establish order. During his reign, Egypt experienced great prosperity as he organized society with a system of fair laws. He was a god associated with the fertility of the earth, the cycles of the seasons and the passage between life and death. Osiris' antagonist was his brother Seth, who ruled over disorder, infertility, desert and violence. He was married to his sister Isis, the mother goddess of the Egyptians. The main place of worship of Osiris, especially during the Middle Kingdom, was in the city of Abydos.