pattern on which Spanish American cities were built beginning in the colonial era. At the heart of Spanish colonial cities was a central plaza, with the main church, town council (cabildo) building, residences of the main civil and religious officials, and the residences of the most important residents (vecinos) of the town built there. The principal businesses were also located around this central plan. Radiated from the main square were streets in at right angles, a grid that could extend as the settlement grew, impeded only by geography. About three decades into colonization of the New World, the conquistadores started to build and plan cities according to laws prescribed by the monarchs in the Laws of the Indies. In addition to describing other aspects of the interactions between the Spanish conquerors and the natives they encountered, these laws ordained the specific ways new settlements should be laid out. In addition to specifying the layout, the laws also required a pattern in settlement based on social standing, in which the people of higher social status lived closer to the center of the town, the center of political, ecclesiastical, and economic power. The 1790 census for Mexico City indicates that in the traza that there was indeed a higher concentration of Spaniards (españoles), but that there was no absolute racial or class segregation in the city, particularly since elite households usually had non-white servants. The grid was not limited to Spanish settlements; however, "Reducciones" Indian Reductions and "Congregaciones" were created in a similar grid-like manner for Indians in order to organize these populations in more manageable units for purposes of taxation, military efficiency and in order to teach Indians the way of the Spanish. Modern cities in Latin America have grown, and consequently erased or jumbled the previous standard spatial and social organization of the cityscape. Elites do not always live closer to the city center, and the point-space occupied by individuals is not necessarily determined by their social status. The central plaza, the wide streets and a grid pattern are still common elements in Mexico City and Puebla de Los Angeles. It is not uncommon in modern-founded towns, especially those in remote areas of Latin America, to have retained the "checkerboard layout" even to present day. Mexico City is a good example of how these ordinances were followed in laying out a city. Previously the capital of the Aztec empire, Tenochtitlan