Chichén Itzá is one of the most important ruins on Mexico's Yucatán 
		Peninsula. It is located about 120 kilometers east of Mérida in the 
		state of Yucatán. Its ruins date from the late Maya period. Covering 
		1547 hectares, Chichén Itzá is one of the most extensive sites in the 
		Yucatán. The center is occupied by numerous monumental representative 
		buildings with a religious and political background, from which a large, 
		largely preserved step pyramid protrudes. Ruins of upper-class houses 
		are in the immediate vicinity.
Between the 8th and 11th 
		centuries, this city must have played a nationally significant role. 
		However, it has not yet been clarified what exactly this looked like. 
		What is unique is how different architectural styles coexist in Chichén 
		Itzá. In addition to buildings in a modified Puuc style, there are 
		designs that show Toltec features. In the past, this was often 
		attributed to a direct influence of emigrants from central Mexico or 
		conquerors from Tula. Today one tends to start from diffusionist models 
		and assumes that different stylistic forms are largely simultane- ous in 
		the monumental buildings.
The development of tourism in the 
		Yucatán has made Chichén Itzá the archaeological site that attracts the 
		most visitors in Mexico after Teotihuacán. Chichén Itzá was declared a 
		World Heritage Site by UNESCO in 1988. On March 30, 2015, the memorial 
		was included in the International Register of Cultural Property under 
		Special Protection of the Hague Convention for the Protection of 
		Cultural Property in the Event of Armed Conflict.
The city's name comes from the Yucatec Maya and means "at the edge of 
		the well of the Itzá". It is composed of the three words chi’ (“mouth, 
		rim, bank”), ch’e’en (“well” or “cave with water”) and itzá (the 
		people’s own designation).
The "fountain" in the name of the city 
		meant the water-bearing doline (cenote), which is now known as Cenote 
		Sagrado. Chichén Itzá is situated on a very uneven karst terrain with 
		generally but little elevation change, dotted with many collapse 
		sinkholes (known locally as rejolladas); these usually do not reach the 
		groundwater horizon, but offer favorable conditions for planting for 
		microclimatic reasons. One water-bearing doline is located north (Cenote 
		Sagrado) and south (Cenote Xtoloc, next to the small temple of the same 
		name) of the center. It is certainly no coincidence that the ceremonial 
		center lies exactly between these two cenotes.
Another name given 
		to the city before the arrival of the Itzá is mentioned in Chumayel's 
		Chilam-Balam. How this name - Uuc Yabnal - is to be understood has not 
		yet been satisfactorily clarified.
In 1533, almost ten years before the Spanish had completed their 
		conquest of the Yucatán, Francisco de Montejo the Younger established a 
		small settlement in the ruins of Chichén Itzá called Ciudad Real. So 
		far, no archaeological traces have been found of the simple dwellings 
		built at that time. The settlement was besieged by the Maya and could 
		not be held. Diego de Landa (who was not there himself at the time) 
		reports that the pressure was so great that the Spaniards could only 
		withdraw secretly at night. Landa, who came to the Yucatán in 1549, 
		gives a fairly detailed description of some of the buildings in the 
		center of Chichén Itzá - namely the castillo and the two small platforms 
		- as well as the wide road to the sacred cenote and objects he found 
		there. A brief note of his visit to the ruins on July 26, 1588 was left 
		by Antonio de Ciudad Real.
Early modern descriptions and research
		Among the earliest modern visitors was Baron Emanuel von Friedrichsthal, 
		in 1840, then first secretary of the Austrian legatee in Mexico. He also 
		took up daguerreotypes, but was unable to publish his report. In 1841, 
		John Lloyd Stephens and Frederick Catherwood stayed at Chichén Itzá for 
		a long time, preparing detailed descriptions and drawings. Stephens' 
		accounts brought the Central American ruins, including Chichén Itzá, to 
		the attention of those interested in North America and Europe. They 
		encouraged, among others, the French Désiré Charnay to undertake 
		research trips. He visited Chichén Itzá in 1860 and took numerous 
		photographs there.
The New York amateur archaeologist Augustus Le Plongeon undertook the 
		first excavations in 1875. However, the historical depictions that he 
		extensively presented in his works belong to the realm of the 
		imagination. He was followed in quick succession by Teoberto Maler, who 
		left only sparse records in addition to photographs, and the Englishman 
		Alfred Percival Maudslay, who devoted six months to the ruined city. The 
		American diplomat Edward Thompson bought the hacienda on whose grounds 
		Chichén Itzá is located in 1894 and conducted research there until the 
		1920s. Among other things, he dredged from 1904 the deposits in the 
		sacred cenote, where he also undertook diving expeditions. He was 
		accused of illegally taking numerous valuable objects out of the 
		country, but these charges were later dropped as unfounded.
		Beginning in 1924, the Carnegie Institution of Washington, under the 
		direction of Sylvanus Griswold Morley, carried out excavations and 
		reconstructions in cooperation with Mexican government agencies. 
		Carnegie Institution archaeologists (including Eric Thompson) worked on 
		ruins at the great platform (particularly the Temple of the Warriors), 
		at the Caracol, the Monjas and the Mercado, and at the Temple of the 
		Three Doorbeams far to the south. Restoration work has been carried out 
		by archaeologists from the Mexico Antiquities Authority on the Castillo, 
		the Great Ball Court, the Tzompantli, the Platform of the Eagles and 
		Jaguars, and the Platform of Venus. The extensive excavations of the 
		Carnegie Institution in Chichén Itzá laid the foundation for the 
		chronology of the entire northern Yucatán based on the pottery found. 
		Carnegie Institution scholars also developed the view that Chichén Itzá 
		was where the cultures of native Mayans and immigrant Toltecs met, as 
		evidenced by different architectural styles. The Carnegie Institution 
		and later the Mexican INAH (Instituto Nacional de Antropología e 
		Historia) also carried out a precise mapping of Chichén Itzá, which 
		covers many times the area accessible to tourists today.
Recent 
		excavations and restorations by the INAH since the 1980s (mostly under 
		the direction of the German Peter J. Schmidt) have focused on follow-up 
		investigations and consolidations in the center of Chichén Itzá 
		(completion of the Castillo, the Temple of the Great Sacrificial Table, 
		the eastern part of the Thousand complex of columns, Osarios) and new 
		excavations in the south (entire Grupo de la Fecha). In 2009, new 
		excavations began around the castillo under Rafael Cobos.
The history of ownership of Chichén Itzá is unusual and has had a not insignificant impact on exploration and conservation: after Edward Thompson's death in 1935, his heirs sold the hacienda to the influential Yucatec Barbachano family since the 19th century, who now run two hotels there . Although the Chichén Itzá site has been officially declared an archaeological site and is effectively federal territory (zona federal), this has had no consequences under private law. In March 2010, the last owner, Hans Jürgen Thies Barbachano, sold a portion of the 80-hectare Chichén Itzá site, which includes the most important buildings of the old city, to the Yucatán government for 220 million pesos (about 13 million euros ). On the site of the old town there are not only several hotels, but also settlements of the local population.
There are three different types of information sources for the 
		history of Chichén Itzá, each of which sheds light on different topics:
		the archaeological findings from excavations and recording of surface 
		finds as well as measurements
The inscriptions in the hieroglyphic 
		writing of the Maya
The Written Accounts of the Aftermath of the 
		Spanish Conquest
It is not uncommon for information from the 
		three types of sources to be inconsistent, and to a significant degree 
		even contradictory, because they arose in different situations. 
		Archaeological evidence is the unintended result of human life and 
		therefore not consciously altered or focused. However, the uneven 
		chances that traces from different areas of life are reflected in 
		material finds and the preservation conditions in the soil act as a 
		filter through which only parts of the past reality of life are 
		recognizable. Contemporary written monuments, on the other hand, are 
		subject to a different thematic selection: here it was the local rulers 
		who had themselves and their dynasties and their deeds carved in stone 
		for their own glorification. The third group of sources, written 
		centuries after the events recounted, are shaped by the perspective of 
		their authors and the intentions behind the writing. Here the texts of 
		Spanish clerics and those of Indian village scribes differ 
		fundamentally. In addition, the authors' different access to the 
		information and the unavoidable distortions to which they were already 
		subjected play a decisive role.
Archaeological Sources
		According to the types of pottery found, Chichén Itzá has a settlement 
		history of almost two thousand years. However, buildings can only be 
		proven for the late classical period around 750 AD, which corresponds to 
		the cultural development in the Puuc style further to the southwest. 
		This was followed by different building forms in the End Classic that 
		were associated with Toltec influence or even the presence of emigrants 
		or conquerors from Tula until the 1970s. During this time, the buildings 
		on the Great Terrace with the ball court, the Castillo, the Warrior 
		Temple and the thousand-column complex up to the so-called Mercado were 
		built, but also in other parts of the city, which has meanwhile grown 
		enormously. Today it is assumed that the monumental buildings belonging 
		to the “Toltec” and a modified Puuc style were largely contemporaneous. 
		How the sometimes striking stylistic similarities between Tula and 
		Chichén Itzá can be explained historically has not yet been resolved.
		
Chichén Itzá directly ruled over a smaller area, as shown by the 
		inscriptions in nearby sites. It is believed that Isla Cerritos served 
		as the port for the commercial activities discernible in materials from 
		the north and central Mexican highlands, Guatemala, Costa Rica, and 
		western Panamá. In the Postclassic, the city was slowly depopulated and 
		visited only by pilgrims who brought offerings, as is also documented in 
		many other places.
Hieroglyphic inscriptions with dates
The 
		following summary of dates in hieroglyphic inscriptions from Chichén 
		Itzá and the nearby sites Halakal and Yula is based on a list provided 
		by Nikolai Grube and has been updated. It shows that hieroglyphic 
		inscriptions (with two exceptions) only exist for the very short period 
		of around 60 years.
All Long Count dates in square brackets are 
		calculated. The notation of the dates on the monuments is either 
		exclusively as a calendar round or exclusively or additionally in the 
		notation "tun [number] in the k'atun ending with the day [number] ajaw". 
		The k'atun 1 ajaw is expressed in the Long Count as 10.2.0.0.0.
Chilam Balam Books
Of the 17th- and 18th-century Yucatán 
			village books known collectively as the Chilam Balam books, three 
			(named after the places where they were found, Tizimín and Chumayel, 
			and the Codex Pérez) contain chronicle-like listings of years in the 
			form of k'atun [number] ajaw. These annual figures include 
			keyword-like, often unclear statements about events. Since the 13 
			possible names of the k’atun, which lasted almost 20 years, are 
			repeated after around 256.27 years, no clear statements of time 
			within a longer period of time are possible. Therefore, when 
			determining European dates, other aspects must also be taken into 
			account, which change with the progress of research. The 
			contradictions between the chronological order in the various 
			sections of the Chilam Balam texts lead to further problems of 
			interpretation. The Chilam Balam books also still contain prophecies 
			in which events are linked back to k'atun dates. These events are 
			partly reflections of historical events and can possibly be used to 
			elucidate them.
Spanish Writings of the 16th Century
The 
			most important source is the report of the Franciscan and later 
			bishop Diego de Landa (only preserved in a later, probably heavily 
			edited copy). Information is also provided by the 50 Relaciones 
			[geográficas] de Yucatán, reports from 1577 to 1581 based on an 
			official questionnaire on all aspects of the country, written by 
			local administrators using indigenous informants. For parts of the 
			Yucatán, many of the reports are based on information from the Mayan 
			chronicler Gaspar Antonio Chi and are therefore not to be considered 
			independent of one another. Works by other mostly Spanish authors 
			contain only a few details.
The reconstructed history differs fundamentally depending on the 
		source used. While the hieroglyphic texts offer the self-representation 
		of a small section of a ruling dynasty, the colonial and later written 
		texts consist of largely unconnected, brief individual reports that can 
		only be combined to form questionable representations. Overall, most of 
		the history of Chichén Itzá remains (and probably will remain) unknown.
		
History according to hieroglyphic inscriptions
The inscriptions 
		only cover a relatively short period in the history of Chichén Itzá, 
		essentially a ruling family, particularly its important exponents.
		
According to the inscriptions, Ek Balam, which was clearly oriented 
		towards the core area of the Classic Maya culture far to the south, 
		initially held the predominance in the northern Yucatán. Chichén Itzá 
		also appears to have been subordinate to Ek Balam at first. The series 
		of inscriptions at Chichén Itzá reliably dated with Mayan dates begins 
		with a long horizontal band in the front room of the Red House (Casa 
		Colorada). In this inscription, its authors differ significantly from 
		the Ek Balam inscriptions by using a local language form that later 
		appears as Yucatec Maya.
The inscription first tells of a 
		ceremony in the year 869 performed by K'ak'upakal K'awiil ("Fire is the 
		shield of K'awiil"), the prominent figure in the Chichén Itzá 
		inscriptions. Less than a year later, fire ceremonies were held 
		involving K'ak'upakal and K'inich Jun Pik To'ok', rulers of Ek Balam, 
		and an apparently equal member of the Kokom family, known from the 
		colonial era. K'ak'upakal is last mentioned in an inscription from 890. 
		The name of his brother, the second major figure at Chichén Itzá, is 
		tentatively read as K'inil Kopol. Like his brother, he bears a ruler's 
		title that is not otherwise found, but is only mentioned in inscriptions 
		between 878 and 881. Her mother was Mrs. K'ayam, while the father 
		remains unclear with an unsatisfactorily read name, which may correspond 
		to an emphasis on maternal descent at Chichén Itzá.
K'ak'upakal 
		and K'inich Jun Pik To'ok' also appear at a monument in nearby Halakal, 
		presumably with an as yet unidentified local ruler. Also in neighboring 
		Yula, K'ak'upakal appears, along with the local ruler To'k' Yaas Ajaw 
		K'uhul Um and others in connection with fire ceremonies. In the Chichén 
		Itzá building now known as Akab Dzib, Yahawal Cho' K'ak', a member of 
		the Kokom family, claims to be its owner. But other inscriptions from 
		unidentified buildings also relate them to the Kokom.
The dates 
		given in the inscriptions on buildings indicate three construction 
		periods. The oldest, which predates the rise of K'ak'upakal, includes 
		the Akab Dzib and Casa Colorada buildings, the next includes the 
		construction of the Monjas complex. The latter includes the buildings of 
		the Grupo de la Fecha and the Temples of the Three and Four Lintels, all 
		commissioned by K'inil Kopol. This also ends the dense sequence of dated 
		inscriptions. For the later period in which the buildings designated as 
		Toltec were built, there are no inscriptions that could provide 
		information about the exact time of construction and the people 
		involved. One can conclude that the ability to write inscriptions either 
		no longer existed or was no longer valued.
Numerous names 
		previously considered members of a relatively egalitarian system of rule 
		under the Mayan designation multepal are now recognized as names of 
		gods, rendering the assumed peculiar political structure irrelevant. The 
		initial misunderstanding stems from the fact that gods and rulers, 
		possibly only after their death, appear in the same context, primarily 
		as owners of buildings.
Sylvanus Griswold Morley developed a chronological scheme based on a 
		literal adoption of the statements of (certain) Chilam Balam texts. Due 
		to the calendar correlation used, the dates are sometimes around 256 
		years too late.
948 The Itzá leave Chakán Putum for the northern 
		Yucatán
987 Itzá resettlement of Chichén Itza, supremacy of Chichén 
		Itza in northern Yucatán
1224 Conquest of Chichén Itza by Hunac Ceel, 
		the Itzá are expelled, dominance of the Cocom from Ich Paa over the 
		Yucatán
1441 Ah Xupan Xiu leads the uprising that destroys Ich Paa, 
		killing almost all Cocom members
In the 1950s, Alfred M. Tozzer 
		in particular tried to interpret the statements of the sources more 
		reliably against the background of the archaeological results available 
		at the time. Although this reconstruction is viewed critically today, it 
		can be found in many general representations.
Settlement (the 
		Chilam Balam texts speak of the "discovery") is put at 692 (Chilam Balam 
		of Tizimin), 711 or 731 (two sections in the Chilam Balam of Chumayel), 
		according to the Codex Pérez between 475 and 514, although Tozzer does 
		not consider any of these dates to be historical. Colonial sources also 
		speak of a Great Descent (from the East) and a Small Descent (from the 
		West), with size referring to the number of people. For the Great 
		Comedown there is (in the Chumayel) even a long list of places starting 
		with Port Polé on the east coast.
Several texts refer to an 
		obscure happening around a person named Hunac Ceel, which can be dated 
		to 1194. According to the Codex Pérez, the chief of Chichén Itzá, Chac 
		Xib Chac, was expelled because of the underhandedness of Huac Ceel, 
		ruler of Mayapan. He was driven out by several people with Náhuatl-esque 
		names. This expulsion was in connection with a banquet given by Ulil, 
		the lord of Izamal. The strangers were later named Cupul, and they were 
		encountered by Francisco de Montejo during the Spanish conquest at 
		Chichén Itza. The story is told somewhat differently in the Tizimin 
		text: Chac Xib Chac was also invited to the wedding feast of Ah Ulil of 
		Izamal, as was Hunac Ceel. His deviousness consisted in giving the Chac 
		Xib Chac a love spell to sniff, whereupon he coveted the bride of Ah 
		Ulil. War broke out and Chac Xib Chac was expelled from Chichén Itzá.
		
Sometime, according to Landa, between 1224 and 1444, a Kukulcán 
		arrived with the Itzá at Chichén Itzá, and later founded Mayapan.
		
Hunac Ceel was later thrown into the Sacred Cenote of Chichén Itzá, 
		but he survived and came back with the prophecies and became Supreme 
		Chief. Ruler was Ah Mex Cuc. Chichén Itzá came to an end in 1461, and 
		some of its residents moved to the far south island town of Tayasal on 
		Lake Petén, where they retained their independence until March 13, 1697.
		
A later view sees the Itzá as an immigrant group who had come from a 
		more Mexican-influenced area. They reached the Yucatán in the 
		aforementioned Small Coming Down from the West. Among other things, it 
		is said of them that they had only a broken command of the Mayan 
		language. Their leader appears to be Kukulcán (whom earlier research 
		linked to the Topiltzin Quetzalcoatl of the same name in Náhuatl from 
		Tula), who is said to have left his country for the Gulf of Mexico. This 
		is set in the year 987. However, historical analysis of the historical 
		records cannot clarify what role (if any) played by Toltec immigrants, 
		warriors, or religious leaders at Chichén Itzá.