Tonatiuh is the name of the sun god in the mythology of the ancient Aztecs. He was considered a vital deity, representing the sun's life-giving energy and warmth. The Aztecs believed that Tonatiuh required human sacrifices to ensure the sun would rise each day, reflecting the importance of the sun in their agricultural society. In Aztec art, Tonatiuh is often depicted as a fierce figure with a radiant face and a headdress made of feathers. He is sometimes shown emerging from a solar disk, symbolizing his role as the sun itself. Tonatiuh's significance highlights the Aztecs' deep connection to nature and their understanding of celestial cycles.