A 1794 map of Mexico City shows an early effort to improve the urban area by Viceroy Juan Vicente Güemes Pacheco de Padilla Revillagigedo (1740-99).
“This map reflects the viceroy's interest in improving the capital city through paving, lighting, and public health projects. The map includes an extensive keyed legend and notes on urban development, and is color coded to indicate the condition of streets and houses and to provide information about drainage.”
Reference and Map: Iconographic Plan of Mexico City. The Library of Congress