Chichén Itzá is the best example of the migratory movements that took place in Mesoamerica towards the Early Postclassic the Early Postclassic, as it brings together features of material culture from both the Maya area and central Mexico, particularly of Toltec origin. of material culture from both the Maya area and central Mexico, particularly of Toltec filiation. Chichén Itzá was also the capital of a large territory in the Yucatan peninsula. territory in the Yucatan peninsula, headed by the Mayapan league, from 987 to 1200 AD. d. C. The archaeological site of Chichén Itzá is world famous for the play of light and shadow that occurs on each equinox occurs on the stairway of the pyramidal base known as El Castillo. At the sun, as it rises over the horizon, illuminates the western alfarda of the foundation, creating triangles of light and shadow, creating triangles of light and shadow, creating triangles of light and shadow that seem to descend to the serpent's head at the top of the alfarda. of the alfarda. This event, achieved through the correct orientation and inclination of the planes of the base, shows the the correct orientation and inclination of the foundation planes, shows the great level of astronomical and architectural knowledge that the Mayas possessed, and which has the Maya possessed, and which has made them one of the most studied cultures and regions in terms of these topics, in addition to the political political-territorial organization and the exploitation of resources. Chronology 525 to 1200 A.D. Main chronological location: Early Postclassic 900 to 1200 A.D.