Abstract
This work takes up research data from several years ago, from the end of the century to be more precise; it deals with the sunrise registration during dates as solstices and equinoxes, among others, that match pre-Hispanic festivities in turn. Registration was carried out from the entrance of the Church of The Sacromonte, located at the top of a hill, in the town of Amecameca, State of Mexico. This observation showed the existence of a calendar's horizon, where the Sun marks the seasons along the geographic landmarks, and where places of worship of pre-Hispanic times have been found in the high mountains as well as some modern remains.
