Â The old city center or Centro Historico of Mexico City, centered around the Plaza de la Constitucion, is an area clearly different from the rest of the city. Its colonial and European architecture and narrow cobblestone streets set it apart from the rest of Mexico City. It has an enormous amount of stores, street vendors, and especially crowds. Without a doubt, this area is one of the most popular ones in Mexico City.
The Centro Historico, the original foundation of Mexico City, was built on the ruins of Tenochtitlan, the Aztec empire capital established around 1325 and destroyed by the Spanish in 1521. It contains a large amount of old buildings that date back to the 16th century. Due to its importance, it was included in UNESCO’s list of world heritage places in Mexico.»