Wikipedia
Cotzumalhuapa
Santa Lucía Cotzumalhuapa (or Cotzumalguapa) is the name of a pre-Columbian Maya archaeological zone dating mainly to the Late Classic period in Mesoamerican chronology, although it was occupied since the Middle Preclassic period and there is evidence of a major development during the Late Preclassic period.
The famous Stela 1 from El Baúl has one of the earliest inscriptions in Mesoamerica, with the earliest legible hieroglyphic Long Count date in Guatemala equaling 37 CE.