In Andean mythology, the Moche, Chimu and Incas were descendants of the Sun, which had to be worshipped annually with an extravagant celebration. The festival took place at the end of the potato and maize harvest in order to thank the Sun for the abundant crops or to ask for better crops during the next season. During this important religious ceremony, the High Priest would sacrifice a completely black or white llama. Using a cermonial tumi, he would open the animal's chest and by observing the organ, he could foretell the future. In Peru, to hang a tumi on a wall means good luck. The tumi is the national symbol of Peru and has become a symbol used in Peruvian tourism publicity.