Major Medieval Structure Discovered at Selja Reshapes Early Christian History of Norway
Archaeologists have uncovered a previously unknown medieval stone structure outside the walls of Selja Monastery, a discovery that is transforming historians' understanding of one of Norway's earliest and most significant Christian centres.
The newly identified building was discovered by researchers from the Norwegian Institute for Cultural Heritage Research (NIKU) using advanced digital archaeological techniques. The find adds to a growing series of discoveries suggesting that Selja was not simply a monastery, but a much larger and more active medieval settlement than previously believed.Image Credit : Dag-Øyvind Engtrø Solem, NIKU
A Hidden Building Beneath the Landscape
The discovery was made by building archaeologist Regin Meyer, who combined ground-penetrating radar (GPR) with detailed digital landscape analysis to identify buried archaeological remains.
Researchers detected a substantial stone wall measuring approximately two metres in width and extending at least 13 metres south from an area close to Selja's modern pier.
The impressive thickness of the wall indicates that it formed part of a robust and carefully constructed building rather than a simple boundary or retaining wall.
Although only a portion of the structure has been identified, archaeologists believe the masonry continues beneath the ground, leaving its full size and layout unknown.
A Discovery That Raises New Questions
Perhaps the most significant aspect of the discovery is its location.
Unlike the well-known monastery buildings, the newly identified structure lies outside the established monastery enclosure, suggesting it belonged to another part of Selja's medieval landscape.
Its exact function remains uncertain.
Researchers are considering several possibilities, including whether the building was connected with:
- The Benedictine monastery
- The bishopric established on Selja during the 11th century
- The earliest religious settlement associated with St Sunniva
To answer these questions, archaeologists collected soil samples and other datable materials for laboratory analysis.
These studies are expected to determine both the building's age and its possible role within the expanding medieval complex.
Selja: One of Norway's Earliest Christian Centres
Selja occupies a unique place in Norwegian history.
Located in Stad Municipality in Vestland County, the island became one of the country's earliest centres of Christian worship and pilgrimage.
According to tradition, St Sunniva, an Irish princess, fled persecution during the 10th century and sought refuge on Selja with her followers. Legend says she died there as a martyr, and her story became one of Norway's earliest saint traditions.
The island later became even more important after King Olav Tryggvason is said to have discovered Sunniva's relics and built a church on the site around AD 996.
During the following centuries, Selja became:
- Western Norway's first bishopric
- A major pilgrimage destination
- Home to an influential Benedictine monastery that expanded throughout the 12th, 13th and 14th centuries
Recent Discoveries Continue to Rewrite Selja's History
The latest find is the third major archaeological breakthrough at Selja in recent years.
Earlier Stone Church Found in 2024
In 2024, archaeologists uncovered evidence of an earlier stone church beneath the ruins of St Sunniva Church.
Its architectural features resembled Anglo-Saxon church construction, raising the possibility that it represents one of the earliest stone churches ever built in Norway.
Additional Medieval Ruins Found in 2025
A year later, researchers identified another previously unknown medieval building northwest of the monastery complex.
That discovery provided the first clear indication that settlement extended well beyond the traditionally recognised religious buildings.
2026 Discovery Expands the Medieval Landscape
The newly discovered stone structure now strengthens the growing evidence that Selja was far more extensive than historians once believed.
Instead of functioning solely as a monastery and pilgrimage site, the island appears to have supported a broader community with additional buildings, infrastructure and daily activities.
Digital Archaeology Reveals Hidden Heritage
The discoveries at Selja have been made possible through the increasing use of modern archaeological technology.
Rather than relying exclusively on excavation, researchers have combined several non-invasive methods, including:
- Ground-penetrating radar
- Digital terrain modelling
- Remote sensing
- Geophysical surveys
Ground-penetrating radar surveys carried out in 2022 first revealed several buried anomalies beneath the landscape, allowing archaeologists to investigate areas that had remained untouched despite almost two centuries of research.
These technologies are helping researchers identify hidden structures while preserving fragile archaeological remains.
What Comes Next?
The newly discovered structure has only been partially investigated.
Archaeologists hope future funding will allow a full excavation to determine:
- The complete layout of the building
- Its construction date
- Its original purpose
- How it related to the monastery and bishopric
- The people who lived and worked there
Laboratory analysis of the recovered samples is expected to provide important clues about the chronology of the site.
A Discovery That Changes the Story of Medieval Norway
Although much of Selja has been studied for generations, the latest discovery demonstrates that significant parts of its history remain buried beneath the ground.
The growing number of previously unknown buildings is reshaping scholars' understanding of one of Norway's earliest Christian centres, revealing a settlement that was larger, more complex and more active than once imagined.
As research continues, Selja promises to provide valuable new insights into the spread of Christianity, medieval monastic life and the development of early Norwegian society.