Archaeologists discover rare 4,000-year-old stone tomb ahead of industrial development in Norway

Archaeological excavations conducted before construction projects sometimes uncover significant proof of ancient communities. In southeastern Norway, researchers preparing land for a planned business park have found a rare stone tomb believed to be around 4,000 years old, providing new opportunities to analyze prehistoric burial customs.

The tomb was discovered on the Svinesund plateau near Halden, close to the Swedish border. Known as a hellekiste, meaning “slab chest,” the structure was uncovered by archaeologists from the Museum of Cultural History at the University of Oslo during investigations ahead of the proposed development.

An unexpected discovery on the Svinesund plateau

The archaeological team was primarily investigating proof of a possible Stone Age settlement. During an inspection, project director Kjersti Væge found charcoal and fire-cracked stones in the ground, which can indicate ancient hearths or cooking pits.


As the team carefully cleared the region, the outline of a stone structure emerged.

The tomb is established from large stone slabs weighing many hundred kilograms each. The stones were carefully placed and secured at the corners, while neatly arranged slabs form the floor. The structure is around 70 centimetres deep.

Less than 20 similar graves have been documented in eastern Norway, making the discovery especially significant for researchers examining the region's ancient past.

What is a hellekiste?

A hellekiste is a box-shaped burial structure established using stone slabs. These graves are linked with the period when farming communities became established in Scandinavia, around the transition from the Late Stone Age to the Early Bronze Age.

The Halden tomb is estimated to be around 4,000 years old, although researchers have not yet confirmed its exact date. Its age is currently based on comparisons with similar archaeological discoveries.

As per the information provided by researchers, almost 2,000 examples of these graves are known in Sweden, compared with around 20 in Norway and 150 in Denmark.

Artefacts offer clues about the burial

Archaeologists recovered many objects from the tomb, including a flint arrowhead, an amber bead and a fragment of pottery decorated with cord-marked patterns.

The absence of a flint dagger has attracted specific attention. Such daggers are commonly linked with similar graves from the same period.

“Flint daggers have been found in every such grave from the same periods,” Rosenvinge stated to Science Norway.

Although the Halden tomb has an arrowhead, no dagger was discovored.

“So there is something a little different about this one,” Rosenvinge said.

Charcoal may help establish the tomb's age

The discovery of charcoal and burned bone could offer further details regarding the burial. Researchers are investigating whether the remains are linked to the original construction or suggest a cremation performed later.

“We are wondering whether these could be burned bone remains from a cremation,” Rosenvinge cited.

The researchers have not yet found whether the burned material is human or how old it is. The charcoal could date to the construction of the tomb, or it could suggest that another burial took place at the site later.

Rosenvinge said it was possible that various burial customs had been used for people with different social roles, although no definitive comprehension is available.

What other ancient graves reveal

Archaeologist Morten Ramstad, head of section at the University Museum of Bergen, cited that the gallery graves offer valuable proof of changing communities and burial traditions in prehistoric Scandinavia.

“They lived in two-aisled longhouses. These are post-supported houses that differ from those in which hunter-gatherers in Norway had previously lived,” he cited.

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The tomb's future remains undecided

The discovery was made during archaeological investigations ahead of the planned business park. Researchers are currently working to document the structure and analyse the samples collected from the site.

The museum is discussing the tomb's future with regional officials in Østfold county. Options that include preserving it in place, relocating it, reconstructing it elsewhere or removing it after documentation is complete.

Currently, the discovery offers a rare opportunity to analyze an unusually well-preserved prehistoric burial structure and learn more regarding ancient communities in southeastern Norway.


Source: Science Norway and La Brújula Verde