|Common languages||Classical Nahuatl|
• Formation of the Aztec Empire
Tlacopan (From Classical Nahuatl, tlacōtl, meaning stem or rod and -pan, meaning place in or on. This roughly translates to "place on the rods"), also called Tacuba, was a Mexica altepetl situated on the western shore of Lake Texcoco, on the site of today's neighborhood of Tacuba in Mexico City.
In 1428, after its successful conquest of Azcapotzalco, Tlacopan allied with the neighbouring city-states of Tenochtitlan and Texcoco, thus becoming a member of the Aztec Triple Alliance and resulting in the subsequent birth of the Aztec Empire.:xxxviii
Aculnahuacatl Tzaqualcatl, the son of the Tepanec ruler, Tezozomoc, was installed as tlatoani of Tlacopan until his death in c.1430. Throughout its existence, Tlacopan was to remain a minor polity within the Triple Alliance. It received only a fifth of tribute earnt from joint campaigns with its more powerful allies.
In 1521, The Aztec Empire collapsed as a result of the Spanish conquest of Mexico, led by Hernán Cortés and his native Tlaxcallan allies. Over the next few centuries, Tlacopan has been assimilated into the sprawling mega-metropolis of Mexico City. The archæological site of Tlacopan is located in Tacuba, within the present-day minicipality of Miguel Hidalgo.