Xiuhtecuhtli is the Turquoise Lord, Lord of the Year, God of Fire, creator of all life.
Xiuhtecuhtli is also called Ixcozauhqui and Huehueteotl, the Old God. He is the "Mother and Father of the Gods, he who stands at the center of the world." He is the personification of light in the darkness, warmth in coldness, food during famine, and life in death.
Xiuhtecuhtli is often depicted with a red or yellow face, with a censer on his head. As a patron of kings and warriors he is shown wearing a crown and ornaments made of a Turquoise blue stone. As Huehueteotl, he appears as an elderly man, usually bent over and carrying a brazier, or small stove, on his head.
Chalchiuhtlicue is mentioned to be his wife. With Chantico as his feminine counterpart, he is seen as a representation of Ometeotl. His nagual is the Xiuhcoatl, the Fire Serpent.
Xiuhtecuhtli is the central deity in the New Fire ceremony, held every 52 years in year 2 Acatl (Ome Acatl, which is also a name for Tezcatlipoca).
In the tonalpohualli, Xiuhtecuhtli is the protector of day Atl (water). He rules over the last trecena of the tonalpohualli, 1-Tochtli (rabbit). Xiuhtecuhtli is Lord of the Day for days with number 1 ("ce" in Nahuatl). He is the first Lord of the Night.