First of all, it is convenient to insist on the fact, as proven by all archaeologists, that in Teotihuacan the first effigies of the "Feathered Serpent" are found, divinity that would occupy the religious epicenter of the remaining Mesoamerican civilizations ever since. The god Quetzalcotal was born there and also the sacred Nahua laws specify that his birth took place, thanks to the voluntary sacrifice at the peak of the great pyramid, the archaic God of fire, Huehueteotl, whose representation in the figure of an old man squatting And of face crumpled, serves of decoration to many sellers of incense and braziers of Terracot.
The transition from a magical cult to a solar region is evident. Laurette Sejourne explains that the birth of the god Quetzalcoatl and the appearance in Teotihuacán of the Fifth Sun and its ascent to the Citadel. She deduces from this that the priests architects conceived and built the city in each of its details of glory according to the rules of the "Feathered Serpent." The bird (Quetzal) symbolizes, in Nahuatl, heaven, spiritual energy; The serpent (Coatl), the earth, the forces of matter. The hieroglyphic cosmogony of Quetzalcoatl expressed the alliance between heaven and earth, the union of spirit and material. The secret meaning of this worship of the Feathered Serpent is to symbolize and raise in the consciousness of man his dual nature and indicate the way of his solar event. But let's go back to the places we're dealing with. If we consider the ceremonial sector in its articulation, we would verify that it divides two sections united by the axis of the Causeway of the Dead: high above, the celestial selection where the two pyramids are reached one to the other; Below the terrestrial session occupied by the enclosure of the Citadel and by the temple of Quetzalcoatl
All the buildings, palaces and habitable places of the city accommodate the east-west orientation of the pyramid of the Sun, this means that it follows the Sun until the twilight, in other words for the ancient Indians, its descent into the world of The darkness before rising and returning to begin his heavenly ascension. He is able to appreciate that the position of the pyramid inflicted a slight disposition to the East-West axis and the architect Ignacio Marquina, trying to clarify the reason, discovered that the building is directed exactly to the point where the Sun gets into The two days of his journey through the Citadel, heart of the universe.
Strong relationship of the pyramid with a frequent signal in Nahuatl symbols can also be observed: the "Quincunx" in other words, where four points are placed in the figure of a square with a fifth in the center. This figure means at the same time the number five, the center and the heart
For the Nahuas, the heart is a vital point for man, where the opposing forces converge and must be united. In fact, the pyramid can be the monumental expression of a Quincunce, whose central point raised to space becomes space, becomes above itself, and the Quincunx at the same time can be the flat representation of a pyramid.