Zocalo By Deane Barker • April 14, 2024 • This is the proper name for the main square of Mexico City. It has become a common name for the center square of many Mexican cities. It’s Spanish for plinth, as the base for a monument to independence was originally built in this location. Why I Looked It Up The main commerce area of Babylon 5 is called “The Zocalo.” I got to wondering if it had an actual definition or was just a made up word.