 The most important markets, such as the one in Tlatelolco, were set up and taken down every day of the week.This market served about one fifth of the population of Tenochtitlan (Mexico City) before the Conquest and had its own governing system, which included a panel of twelve judges to resolve disputes.Today, one of the most visited exhibits in the National Museum of Anthropology is the model of the pre-Hispanic market such as the one in Tenochtitlan.