The document describes El Zocalo square in Mexico City, which reflects Mexico's cultural heritage as it contains remnants of important sites from both the Aztec and Spanish cultures that collided when the Spanish conquered the Aztecs. Specifically, it mentions El Templo Mayor, the spiritual center of the Aztecs from 1325; the Palacio Nacional, the center of Spanish colonial rule from 1522 to present; and the Catedral Metropolitana cathedral built by the Spanish from 1534 to present, showing where the Aztec and Spanish worlds intersected and the paradoxical clash of the two cultures that shaped Mexico's history.