Aztec mythology cactus. This vision fulfilled a prophecy telling them that they should found their new home on that spot. The Aztecs built their city of Tenochtitlan on that site, building a great artificial island, which today is in the center of Mexico City. This legendary vision is pictured on the Coat of Arms of Mexico. According to legend, when the Mexicans arrived in the Anahuac valley around Lake Texcoco, they were considered by the other groups as the least civilized of all, but the Mexica/Aztec decided to learn, and they took all they could from other people, especially from the ancient
Aztec calendar stone in the next era. The duration of the ages is expressed in years, although they must be observed through the prism of Aztec time. In fact the common thing to figures 676, 364 and 312 is that they are multiples of 52, and 52 years is the duration of 1 Aztec century, and that is why they can express a certain amount of Aztec centuries. Thus, 676 years are 13 Aztec centuries; 364 years are 7, and 312 years are 6 Aztec centuries. Placed among these four squares are three additional dates, 1 Flint ("Tecpatl"), 1 Rain ("Atl"), and 7