Spain unearths 6,300-year-old megalithic tomb

Archaeologists in central Spain are not describing a single isolated tomb so much as a planned burial landscape. The site, called Valdelasilla, sits near Illescas in Toledo province and has been dated to the end of the fifth millennium BC, or roughly 6,000 to 6,300 years ago, according to coverage of the research and the underlying journal paper. Researchers say the complex is the oldest documented monumental necropolis in the interior of the Iberian Peninsula. The excavation points to a cemetery with multiple funerary structures, human remains, and a large central chamber enclosed by a ditch. That matters because archaeologists have long debated whether early megalithic funerary traditions developed first along Iberia’s coasts and only later moved inland. The Valdelasilla evidence, the research team said, suggests inland communities were building substantial funerary monuments at about the same time. (sciencex.com) ### So was this one tomb or a whole cemetery? Valdelasilla includes at least 15 funerary structures, not just one chamber, according to reports on the study. The main necropolis occupied higher ground, while smaller and less organized burials appeared farther south after excavations began in 2020 during construction work in the area. The largest structure, identified as VLD-T450, appears to have been the center of the complex. (sciencex.com) Researchers described it as a circular funerary chamber about 6 meters across, ringed by a ditch about 36 meters in diameter, with both features sharing a southeast-facing entrance. ### What exactly did archaeologists find inside? Human remains from at least 46 individuals were identified in 11 funerary structures and dated through radiocarbon analysis and modeling, according to the study coverage. (archaeologymag.com) The finds also included pottery fragments, stone tools, animal remains and evidence of burning inside the enclosure around the main tomb. Inside the main chamber, researchers found several burial layers. (sciencex.com) One lower level held the body of an adult woman in a flexed position, while another set of remains nearby belonged to a second woman associated with red pigment, beads and pendants. An upper layer contained partial remains of an adult man, according to the excavation reports. ### Why are people calling it “megalithic” if the site had wood and clay structures too? (sciencex.com) The research team said the cemetery shows an early form of megalithic funerary practice rather than only the later, more familiar giant-stone monuments seen elsewhere in Europe. Around the main chamber were smaller funerary spaces made from wood, clay and compacted earth, measuring roughly 2 to 3 meters wide. (archaeologymag.com) That combination is part of why archaeologists see the site as important. The authors said Valdelasilla shares traits with other peninsular cemeteries linked to emerging megalithism, suggesting a local development of monumental funerary architecture in inland Iberia rather than a simple coastal-to-interior sequence. ### What does the 6,300-year date actually mean? The dating in circulation is an approximate shorthand. (sciencex.com) Reports on the study place the first use of the cemetery at the end of the fifth millennium BC, roughly 4300 to 4000 BC, which corresponds to about 6,000 to 6,300 years before present depending on the calibration and reference point being used. Radiocarbon dating was applied to human remains from the site, and the researchers said the cemetery remained in use over generations from the Late Neolithic into the Chalcolithic, or Copper Age. (sciencex.com) The burial practices also changed over time, from more organized individual burials to collective deposits and secondary burials in which bones and skulls were deliberately arranged. ### Where does the reporting go from here? The next step for readers is the primary study. The findings are tied to a 2026 paper in the Cambridge Archaeological Journal, and coverage names Rosa Barroso Bermejo of the University of Alcalá as the lead researcher on the project. (archaeologymag.com) (sciencex.com)