New research from a vast prehistoric site in southwest Spain is reshaping how scholars understand Copper Age society in Iberia. The study focuses on Valencina de la ConcepciĆ³nāCastilleja de GuzmĆ”n, near Seville, and examines 126 individuals buried in the PP4-Montelirio sector. The work appears in the Journal of Archaeological Science: Reports and is led by archaeologist Leonardo GarcĆa SanjuĆ”n.
A long-standing gap in evidence now has answers
For more than a century, experts struggled to understand Copper Age communities because they lacked well-recorded human remains. Famous sites such as Los Millares in Spain and Zambujal and Vila Nova de SĆ£o Pedro in Portugal produced major finds but poor skeletal evidence. Bones were incomplete, disturbed, or poorly documented. That made it nearly impossible to link individuals with tombs and grave goods.
Valencina emerges as a key window into the past
Over the past two decades, better-preserved burial sites across Iberia have transformed research. Valencina now stands out as one of the richest. It holds one of the largest Copper Age skeletal collections in Iberia, along with hundreds of radiocarbon dates that create a reliable timeline. The new study looks at 34 burial structures and confirms they were used between roughly 2900 and 2650 B.C.
A complex burial landscape with many meanings
The graves range from megalithic chambers to stone-lined pits and shallow basins. Many individuals were buried in tightly flexed positions. Others appear to have been disturbed or reburied later. Most burials held only one to three people, although a few contained much larger numbers. These differences suggest a complex funerary system rather than a single uniform ritual.
Megalithic burial structures excavated at the PP4-Montelirio sector of Valencina. These stone-lined chambers show different construction styles, preservation states, and burial contexts from the Copper Age site. #copperage #Valencina #Iberia pic.twitter.com/0SYgOE5IZL
— Tom Marvolo Riddle (@tom_riddle2025) December 18, 2025
Children rarely appear in the burial record
Adults dominate the cemetery. About 79 percent of individuals were adults, and only 19 percent were children or teenagers. Very young children are especially rare. That does not match the expected mortality in pre-modern societies. Researchers believe many infants likely received different burial treatments that left little or no trace.
A society where status was earned, not inherited
No child was buried alone, and none received distinctive grave goods. This contrasts sharply with several richly furnished adult tombs containing ivory objects, gold, amber, rock crystal, and marine shells. Researchers argue that this pattern points to a society where status was gained through personal life achievements rather than inherited at birth.
Women appear at the center of power and ritual
Sex analysis shows women slightly outnumber men. Earlier work at Valencina already revealed unusually powerful women, including the famed āIvory Ladyā and the women buried in the Montelirio tholos. The new data reinforce this. Some of the oldest and most elaborate monuments belong to women.
According to the authors, these challenges long-held assumptions about male dominance in early complex societies and indicate that women played leading political and religious roles.
A cosmopolitan community built on movement
Strontium isotope testing shows that about 52 percent of the individuals tested were not local to Valencina. Both men and women came from elsewhere, some likely from hundreds of kilometres away. This makes Valencina unusual compared to many prehistoric sites.
Researchers describe it as a ācosmopolitanā centre rather than a simple village cemetery. Outsiders could arrive, live, gain status, and even be buried among locals.
Family ties mattered, but not always in predictable ways
Ancient DNA shows that Valencinaās people share ancestry typical of southern Iberian Copper Age populations. Only one pair of close biological relatives appears in the tested sample, and they lived about a century apart.
Negative burial structures with stone elements at the PP4-Montelirio sector of Valencina. pic.twitter.com/LtDNWyM9T2
— Tom Marvolo Riddle (@tom_riddle2025) December 18, 2025
In one collective tomb, no close relatives were identified at all. That suggests collective burials reflected social or ritual bonds, not only bloodlines.
Ritual color, mercury exposure, and daily life
Mercury levels in bones reveal that some individuals experienced long-term exposure to cinnabar, a bright red pigment used in ritual contexts. Several of the highest mercury readings belong to women. In some grave,s cinnabar dust survives, but in others it does not, suggesting exposure came from life activities as well as burial treatments.
An organized society without signs of war
Despite its size and complexity, Valencina shows no clear evidence of violent trauma in this sector. The site lacks strong defensive walls, and the skeletal record does not suggest warfare injuries. Researchers believe this supports the idea of a society structured more around ritual, trade, gathering, and leadership than armed conflict.
A major center of power, culture, and identity in Iberia
Taken together, the findings depict Valencina as one of the most complex sites of its time. It was a monumental centre that drew people, materials, and ideas from across Iberia. Burial customs were diverse and flexible. Status appears earned. Women held central power roles. Locals and outsiders shared sacred space.
For GarcĆa SanjuĆ”n and his team, Valencina now offers one of the clearest views of early social complexity in western Europe. Ongoing work promises to reveal even more about this mobile, female-empowered and highly connected Copper Age society at the heart of Iberian prehistory.
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