The Feathered Serpent was a prominent supernatural entity or deity, found in many Mesoamerican religions. It was called Quetzalcoatl among the Aztecs, Kukulkan among the Yucatec Maya, and Q'uq'umatz and Tohil among the K'iche' Maya.
The double symbolism used by the Feathered Serpent is considered allegoric to the dual nature of the deity, where being feathered represents its divine nature or ability to fly to reach the skies and being a serpent represents its human nature or ability to creep on the ground among other animals of the Earth, a dualism very common in Mesoamerican deities.
The earliest representations of feathered serpents appear in the Olmec culture (c. 1400-400 BCE). The Olmec culture predates the Maya and the Aztec, and once reached from the Gulf of Mexico to Nicaragua. Most surviving representations in Olmec art, such as Monument 19 at La Venta and a painting in the Juxtlahuaca cave (see below), show the Feathered Serpent as a crested rattlesnake, sometimes with feathers covering the body and legs, and often in close proximity to humans. It is believed that Olmec supernatural entities such as the feathered serpent were the forerunners of many later Mesoamerican deities, although experts disagree on the feathered serpent's religious importance to the Olmec.
The pantheon of the people of Teotihuacan (200 BCE - 700 CE) also featured a feathered serpent, shown most prominently on the Temple of the Feathered Serpent (dated 150-200 CE). The Pyramid was built southeast of the intersection of the avenue of the dead and the east-end avenue. Several feathered serpent representations appear on the building, many of them including full-body profiles and feathered serpent heads.The sculptures utilize practices such as relief carving to create complex ornate compositions. Heads carvings of the Feathered Serpent have been frequently found around the Pyramid of the Feathered Serpent.
While the feathered serpent has been a common theme in different Mesoamerican works, it is frequently and most commonly reflected in the architecture of Mesoamerican culture. Some common techniques used to incorporate imagery of the Feathered Serpent into this architecture is relief carving, which involves "a sculpture with figures that protrude from a background while still being attached to it" and normally combined with tenoned heads, which are large pieces of stone carved but have a peg of sorts to insert them into the wall area, adding more depth and details to the architecture. Other Mesoamerican structures, such as the ones in Tula, the capital of the later Toltecs (950-1150 CE), also featured profiles of feathered serpents.
The Aztec feathered serpent deity known as Quetzalcoatl is known from several Aztec codices such as the Florentine codex, as well as from the records of the Spanish conquistadors. Quetzalcoatl was known as the deity of wind and rain, bringer of knowledge, the inventor of books, and associated with the planet Venus.
Along with the feathered serpent deity, several other serpent gods existed in the pantheon of Mesoamerican gods with similar traits, all of which had an important role in the cultural development of Mesoamerican cultures. The proof of the importance of these deities to Mesoamerican culture lies in the architecture left from these civilizations and the rituals surrounding them.