Texcoco (altepetl) in the context of "Otomi language"

The Aztecs (/ˈæztɛks/ AZ-teks) were a Mesoamerican civilization that flourished in central Mexico from 1300 to 1521. The Aztec people included different ethnic groups of central Mexico, particularly those groups who spoke the Nahuatl language. Aztec culture was organized into city-states (altepetl), some of which joined to form alliances, political confederations, or empires. The Aztec Empire was a confederation of three city-states established in 1427: Tenochtitlan (the capital city of the Mexica or Tenochca), Tetzcoco, and Tlacopan, previously part of the Tepanec empire, whose dominant power was Azcapotzalco. Although the term Aztecs is often narrowly restricted to the Mexica of Tenochtitlan, it is also broadly used to refer to Nahua polities or peoples of central Mexico in the prehispanic era, as well as the Spanish colonial era (1521–1821).

Most ethnic groups of central Mexico in the post-classic period shared essential cultural traits of Mesoamerica. The culture of central Mexico includes maize cultivation, the social division between nobility (pipiltin) and commoners (macehualtin), a pantheon, and the calendric system. Particular to the Mexica of Tenochtitlan was the patron god Huitzilopochtli, twin pyramids, and the ceramic styles known as Aztec I to IV. The Mexica were late-comers to the Valley of Mexico, and founded the city-state of Tenochtitlan on unpromising islets in Lake Texcoco, later becoming the dominant power of the Aztec Triple Alliance or Aztec Empire which conquered other city-states throughout Mesoamerica. It originated in 1427 as an alliance between the city-states Tenochtitlan, Texcoco, and Tlacopan to defeat the Tepanec state of Azcapotzalco, which had previously dominated the Basin of Mexico. Soon Texcoco and Tlacopan were relegated to junior partnership in the alliance, with Tenochtitlan the dominant power. The empire extended its reach by a combination of trade and military conquest. It was never a true territorial empire controlling territory by large military garrisons in conquered provinces but rather dominated its client city-states primarily by installing friendly rulers in conquered territories, constructing marriage alliances between the ruling dynasties, and extending an imperial ideology to its client city-states. Client city-states paid taxes, not tribute to the Aztec emperor, the Huey Tlatoani, in an economic strategy limiting communication and trade between outlying polities, making them dependent on the imperial center for the acquisition of luxury goods. The political clout of the empire reached far south into Mesoamerica conquering polities as far south as Chiapas and Guatemala and spanning Mesoamerica from the Pacific to the Atlantic oceans.

Tlahtoāni (Classical Nahuatl: tlahtoāni pronounced [t͡ɬaʔtoˈaːniˀ] , "ruler, sovereign"; plural tlahtohqueh [t͡ɬaʔˈtoʔkeʔ]) is a historical title used by the dynastic rulers of āltepēmeh (singular āltepētl, often translated into English as "city-state"), autonomous political entities formed by many pre-Columbian Nahuatl-speaking peoples in the Valley of Mexico during the Postclassic Period. The title of huēyi tlahtoāni [es] ([ˈweːjiˀ t͡ɬaʔtoˈaːniˀ], "great ruler, emperor") was used by the rulers of the Aztec Empire, an alliance between the āltepēmeh of Tenochtitlan, Tetzcoco, and Tlacopan.

Each āltepētl had its own tlahtoāni who would concurrently function as its ruler, high priest and commander-in-chief. The tlahtoāni wielded ultimate authority over all land within the āltepētl, overseeing tribute collection, market activities, temple affairs, and the resolution of judicial disputes. Typically a dynastic ruler hailing from the royal lineage, the tlahtoāni served for life. However, in certain instances, a council of nobles, elders, and priests could elect a tlahtoāni from a pool of four candidates.

The altepetl (Classical Nahuatl: āltepētl [aːɬ.ˈte.peːt͡ɬ] , plural altepeme or altepemeh [aːɬ.ˈte.ˈpeːme(h)]) was the local, ethnically-based political entity, usually translated into English as "city-state", of pre-Columbian Nahuatl-speaking societies in the Americas. The altepetl was composed of smaller units known as calpolli and was typically led by a single dynastic ruler known as a tlatoani, although examples of shared rule between up to five rulers are known. Each altepetl had its own jurisdiction, origin story, and served as the center of Indigenous identity. Residents referred to themselves by the name of their altepetl rather than, for instance, as "Mexicas". "Altepetl" was a polyvalent term rooting the social and political order in the creative powers of a sacred mountain that contained the ancestors, seeds and life-giving forces of the community. The word is a combination of the Nahuatl words ātl (meaning "water") and tepētl (meaning "mountain"). A characteristic Nahua mode was to imagine the totality of the people of a region or of the world as a collection of altepetl units and to speak of them on those terms. The concept is comparable to Maya cah and Mixtec ñuu. Altepeme formed a vast complex network which predated and outlasted larger empires, such as the Aztec and Tarascan state.

Established altepeme were characterized by a central temple dedicated to a patron god particular to the identity of the altepetl and a central market. Altepeme were typically multiethnic and communal cohesion was often maintained through territorial exclusiveness.

Texcotzingo (alternatively, Tetzcotzingo) is claimed to be one of the first extant botanical gardens in the world, along with Moctezuma's gardens in Huastepec. The gardens and archaeological site are located roughly 20 miles northeast of central Mexico City, Mexico.

Texcotzingo is adjacent to the Aztec capital city of Texcoco and acted as the summer imperial gardens, resplendent in all the royal trappings of the time, including imperial and courtly residences and fantastic waterworks. Tetzcotzingo, however, should also be seen as a hedonist/sacred space, agricultural space, political statement or emblem, performance space, and earthworks.

Tacuba is a section of northwest Mexico City. It sits on the site of ancient Tlacopan. Tacuba was an autonomous municipality until 1928, when it was incorporated into the Central Department along with the municipalities of Mexico, Tacubaya and Mixcoac. The Central Department was later divided into boroughs (delegaciones); historical Tacuba is now in the borough of Miguel Hidalgo. The area was designated as a "Barrio Mágico" by the city in 2011.

Tacuba was called Tlacopan in the pre-Hispanic period. Tacuba is derived from the former Nahuatl name "Tlacopan" and means place of the jarilla plant. It was conquered by Azcapotzalco which placed Totoquihuatzin as governor. When the Tenochtitlan and Texcoco decided to ally against Azcapotzalco, Tlacopan did not resist and for this reason is considered to be the third of the Aztec Triple Alliance. Tacuba's importance led to the construction of a causeway over the lake linking it with Tenochtitlan. Today, this causeway still exists as a major thoroughfare called Calzada Mexico-Tacuba.