Holmul is a pre-Columbian archaeological site of the Maya civilization, located in the northeastern Petén Basin region in Guatemala, near the modern-day border with Belize.
The site was first visited by an archaeological research team in 1911, led by Harvard archaeologist Raymond Merwin. The initial work by Merwin at Holmul (later expanded by George Vaillant) produced the first stratigraphic ceramic sequence to be defined at a Maya region site.
However, the results of this Peabody Museum expedition were not formally published until some twenty years afterwards, and subsequently the site remained relatively little-studied. Excavation and research at Holmul resumed only in the year 2000, as an archaeological group from Boston University, organized by Dr. Francisco Estrada Belli, began to explore the site.
Shortly after its start, this archaeological project received funding from Vanderbilt University, until 2008, when Boston University took over the exploration's funding again.
Holmul, as a city, began its existence at around 800 B.C., and was abandoned by 900 A.D., at around the time that the Maya civilization collapsed due to unknown causes. This made the city one of the longest occupied by the Maya. Holmul reached the height of its power at between 750 and 900 A.D., and may have had a considerable social influence over the many communities located in the compact area around it. The region likely influenced by Holmul is sometimes referred to as the Holmul Domain. One archaeological site located near Holmul, called La Sufricaya, includes painted murals which seem to suggest some degree of foreign involvement in the Holmul Domain.
Foreigners in the region may have been from Teotihuacan, or possibly from Tikal. This could have drastic implications for traditional understand of the relationship between the Maya and the people of Teotihuacan, especially between the years 300 and 550 A.D.
Because of Holmul's status as one of the last Mayan cities to be abandoned, archaeologists are interested in walls built around the city during its last years of habitation. Walls also exist around another city in the Holmul Domain, called Cival, and could suggest the possibility of a final siege near the time of the collapse of the two cities, although the real implications of the structures are unknown.