Kukulkan and The Itza
Kukulkan was a deity closely associated with the Itza state in the northern Yucatán Peninsula, where the cult formed the core of the state religion. Although the cult of Kukulkan had its origins in earlier Maya traditions, the Itza worship of Kukulkan was heavily influenced by the Quetzalcoatl cult of central Mexico. This influence probably arrived via Chontal Maya merchants from the Gulf Coast of Mexico. These Chontal merchants probably actively promoted the feathered serpent cult throughout Mesoamerica. Kukulkan headed a pantheon of deities of mixed Maya and non-Maya provenance, used to promote the Itza political and commercial agenda. It also eased the passage of Itza merchants into central Mexico and other non-Maya areas, promoting the Itza economy.
At Chichen Itza, Kukulkan ceased to be the Vision Serpent that served as a messenger between the king and the gods and came instead to symbolise the divinity of the state.
El Castillo in Chichen Itza served as a temple to Kukulkan. During the spring and fall equinoxes the shadow cast by the angle of the sun and edges of the nine steps of the pyramid combined with the northern stairway and the stone serpent head carvings create the illusion of a massive serpent descending the pyramid.
After the fall of Chichen Itza, the nearby Postclassic city of Mayapan became the centre of the revived Kukulkan cult, with temples decorated with feathered serpent columns. At the time of the Spanish Conquest, the high priest of Kukulkan was the family patriarch of the Xiu faction and was one of the two most powerful men in the city.
The cult of Kukulkan spread as far as the Guatemalan highlands, where Postclassic feathered serpent sculptures are found with open mouths from which protrude the heads of human warriors.
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