MEXICO CITY.- Hundreds of images of Prehispanic monuments and sites, created during the Colonial period and located in diverse archives, most of them outside Mexico, are being studied by archaeologist Leonardo Lopez Lujan, and have became helpful documentary sources for the location of Mesoamerican sculptures and ceremonial sites. Although technological devises make archaeological research easier, the researcher from the National Institute of Anthropology and History (INAH) has been conducting for 6 years this historiographic study of archaeology, deepening in the knowledge of Prehispanic cultures and locating ceremonial sites, cities, buildings and sculptures. The investigation that represented his entrance as a numerary member of the Academia Mexicana de la Historia (Mexican Academy of