At dusk of the great day the main priests wore their best clothes and headed by the priest of Copilco, went to the top of Huizachtecatl to initiate the ceremony. Previously, a prisoner was placed in the main temple altar, and when the time came, a log or mamahuastli was placed on his chest and set on fire to ignite the New Fire; meanwhile, the great Tenochtitlan and towns surrounding the great lake remained in complete darkness. The Copilco priest took the fire from the chest and transmitted it to a bonfire. Later the prisoner was sacrificed, his heart extracted and thrown into the flames. There were messengers responsible to deliver torches lit with the New Fire to priests of towns that had attended the ceremony at Huizachtecatl. At the great Tenochtitlan the fire was placed before the main deity, from where it was taken to other Gods temples, and from there to people’s quarters. Based on archeological investigations, Colhuas were the first to use the top of the hill for the New Fire or Toxiuhmopolli ceremony; historical sources indicate that four such ceremonies took place; in 1351, 1403, 1455 and 1507. The great Tenochtitlan was conquered before the fifth ceremony could take place.