Toltec-descended altepetl on the southern shore of Lake Texcoco whose royal prestige — the first Nahua city to hold the title tlatoani — legitimized the Mexica royal line through Acamapichtli's descent from its king Coxcoxtli (r. 1281-1307).
Subdued by Azcapotzalco (with Mexica troops) in 1377 and absorbed into the Tepanec, then Aztec, tributary system; fell with the rest of the Valley of Mexico to Cortés in 1521.
Covers Colhuacan's role as the Toltec-legitimacy anchor of the Valley of Mexico political system that the Mexica dynasty drew on.
Already used for the canonical 'aztec'/'tlaxcala' records; reconstructs Nahua dynastic legitimacy, including the Colhuacan lineage of Acamapichtli, from indigenous-language annals.