Lighting in urban heritage: case study of Chiapa de Corzo Chiapas Mexico As human thought was developing likewise the technology used for illumination was growing. But a haul through history reviewing its pages and analyzing it inherently brings up old and new question like: Is it possible to alter negatively the image of historic buildings and monuments through inadequate lighting to the degree of distorting the perception that people have of the work and if so what are the causes that generate it Do the light designers take into consideration criteria to protect not only historic buildings and monuments but also the environment What are the consequences that may generate the inadequate lighting of urban heritage to the environment What are the factors to consider for a proper illumination of urban heritage The answers to these questions will help lay the foundation for proper illumination of the urban heritage avoiding at the maximum the light pollution and the effects that it generates seeking a balance and harmonious reconciliation between the technology urban heritage and environment taking as a framework and the case study the urban heritage of a city from the colonial era in southern Mexico with pre Hispanic roots and where today you can still see through its streets and buildings an atmosphere of mysticism reflection of their folklore and traditions this city is known as Chiapa de Corzo Chiapas.