Tlacōpan

Tlacopan, also called Tacuba, was a Tepanec city-state on Lake Texcoco's western shore, subject to nearby Azcapotzalco. Tezozomoc of Azcapotzalco installed his son as its tlatoani.

In 1428 Tlacopan joined Tenochtitlan and Texcoco in the Triple Alliance, with its ruler Totoquihuaztli I among the founders. The junior partner received only a fifth of tribute from their campaigns. Its last tlatoani, Tetlepanquetzal, fought alongside Tenochtitlan against Hernán Cortés, was captured at the city's fall in 1521 and executed by the Spaniards in 1525.