El Castillo also known as the Temple of Kukulkan, is a Mesoamerican step-pyramid

Mesoamerican pyramids

Mesoamerican pyramids, pyramid-shaped structures, are an important part of ancient Mesoamerican architecture. These structures were usually step pyramids with temples on top – more akin to the ziggurats of Mesopotamia than to the pyramids of Ancient Egypt...

 that dominates the center of the Chichen Itza

Chichen Itza

Chichen Itza is a large pre-Columbian archaeological site built by the Maya civilization located in the northern center of the Yucatán Peninsula, in the Municipality of Tinúm, Yucatán state, present-day Mexico....

 archaeological site in the Mexican

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 state of Yucatán

Yucatán

Yucatán officially Estado Libre y Soberano de Yucatán is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 106 municipalities and its capital city is Mérida....

. The building is more formally designated by archaeologists as Chichen Itza Structure 5B18.

Built by the pre-Columbian

Pre-Columbian

The pre-Columbian era incorporates all period subdivisions in the history and prehistory of the Americas before the appearance of significant European influences on the American continents, spanning the time of the original settlement in the Upper Paleolithic period to European colonization during...

 Maya

Maya civilization

The Maya is a Mesoamerican civilization, noted for the only known fully developed written language of the pre-Columbian Americas, as well as for its art, architecture, and mathematical and astronomical systems. Initially established during the Pre-Classic period The Maya is a Mesoamerican...

 sometime between the 9th and 12th centuries AD, El Castillo served as a temple to the god Kukulkan

Kukulkan

Kukulkan is the name of a Maya snake deity that also serves to designate historical persons. The depiction of the feathered serpent deity is present in other cultures of Mesoamerica. Kukulkan is closely related to the god Q'uq'umatz of the K'iche' Maya and to Quetzalcoatl of the Aztecs...

, the Yucatec Maya Feathered Serpent deity

Feathered Serpent (deity)

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...

 closely related to the deity figure Quetzalcoatl

Quetzalcoatl

Quetzalcoatl is a Mesoamerican deity whose name comes from the Nahuatl language and has the meaning of "feathered serpent". The worship of a feathered serpent deity is first documented in Teotihuacan in the first century BCE or first century CE...

 known to the Aztec

Aztec

The Aztec people were certain ethnic groups of central Mexico, particularly those groups who spoke the Nahuatl language and who dominated large parts of Mesoamerica in the 14th, 15th and 16th centuries, a period referred to as the late post-classic period in Mesoamerican chronology.Aztec is the...

s and other central Mexican cultures of the Postclassic period.

The pyramid consists of a series of square terraces with stairways up each of the four sides to the temple on top.