The site was occupied from the Middle Preclassic period right through to the Late Classic period.
Modern history Holtun was officially discovered in February 1994, when the Guatemalan
Instituto de Antropología e Historia (IDAEH - "Institute of Anthropology and History") was notified of the looting of a previously unknown site between Flores and
Melchor de Mencos. IDAEH investigators are estimated to have arrived at the site between six and eight months after looting had started, during which time the major architecture at the site had been damaged. New archaeological investigations were initiated in 2010 by Brigitte Kovacevich and Michael Callaghan of Southern Methodist University.
Research Projects The first official reconnaissance of the site was performed in 1994 by Erick Ponciano and the first map of the site was created. In 1998 and 2001 respectively, two field seasons were performed looking for rescuing information from the previous looting practices. The result was a valuable documentation of the site and its archaeological traits, particularly the masks at the building facades and the
Chultuns. The seasons were performed by personnel of
Yaxhá project from the
National Institute of Anthropology and History of
Guatemala, and conducted by Vilma Fialko. In 2010 the first season of Holtun Archaeological Project, with the support of
Southern Methodist University, perform the first field season. During this season, personnel of the project did an exhaustive reconnaissance and surveying, creating a new map of the site. During the 2011 season, the project perform test pits in the plazas with the objective of collecting information to understand the
ceramic sequence of the site. Also, the excavations pursued to understand the settlement pattern through the study of architectonic modifications in the plazas. The season of 2012 consisted in the analysis of materials collected during the previous season, particularly ceramics,
Obsidian and carbon samples for
Radiocarbon dating. During the next season in 2014, new test pits were done and the mapping project incorporates new land segments and archaeological traits. During this season, soil samples were taken to understand the chemical composition of the floors at the plazas through
X-ray fluorescence analysis.
Mapping Holtun has been mapped three times since the first reconnaissance in 1994. The first version of the map was created in 1994 as part of the first approaching to the site. The first survey reported 86 structures which were organized in four groups named with the literals A, B, C and D. The second map was created by the "Proyecto de Sitios Arqueológicos de Petén"
(PROSIAPETEN). It was a revision of the original map which resulted in the identification of 115 structures organized in 14 major groups. The third map version was created by the Holtun Archaeological Project, which began the research in 2010. The project have been supported by the Department of Anthropology of
Southern Methodist University . The map has been updated over three different mapping season, with the result of more than 200 structures identified and more than 27 chultuns. ==Site description==