Museum of the City of Mexico

The Museum of Mexico City is located at Pino Suarez 30, a few blocks south of the Zocalo, on what was the Iztapalapa Causeway, near where Hernán Cortés and Moctezuma II met for the first time. This building used to be the palace of the Counts of Santiago de Calimaya, who were the descendants of one of the conquistadors with Cortés. The house was extensively remodeled during the colony to much the appearance that it has today and remained in the family until 1960, when the Mexico City government acquired it from them in order to found the Museum that is found there today.

Source: Wikipedia