The construction of 'histories' for the Aztec has been one of the major topics of modern scholarship of late pre-European Mexico. Taking literally accounts that are infused with mythical symbolism, scholars like Nigel Davies arrived at a consensus history: AD 1111 The Mexica leave Aztlan, their mythical homeland, the last of seven peoples to begin wandering AD 1163 They celebrate the New Fire ceremony at Coatepec, marking the end of a 52 year Calendar Round on their journey AD 1215 They celebrate the New Fire ceremony at Apaxco AD 1267 They celebrate the New Fire ceremony at Tecpayocan AD 1299 The Mexica arrive at Chapultepec in the Valley of Mexico AD 1319 The Mexica are expelled from Chapultepec AD 1343 The Mexica sacrifice a princess of Culhuacan and flee from the service of Culhuacan into the lake marshes AD 1345 Tenochtitlan is founded, where the Mexica see an eagle perched on a cactus, the omen predicted by their god ca. AD 1367 The Mexica serve as mercenaries for Tezozomoc of the Tepanec city, Atzcapotzalco AD 1428 Conquest of Atzcapotzalco by Mexica and Texcocans AD 1431 "Triple Alliance" formed by the Mexica of Tenochtitlan, the Tepanecs of Tlacopan, and the Acolhua of Texcoco AD 1473 The Mexica conquer the neighboring city, Tlatelolco AD 1500 The Mexica establish dominance over the Triple Alliance by making Tlacopan a dependency AD 1515 The Mexica install a puppet ruler in Texcoco AD 1519 Hernan Cortes arrives at Tenochtitlan AD 1521 Tenochtitlan surrenders to the armies of Cortes