Archaeologists have uncovered a previously unknown medieval structure outside the walls of the historic Selja monastery, a discovery that is reshaping understanding of one of Norway’s most important early Christian sites.
The find, made by researchers from the Norwegian Institute for Cultural Heritage Research (NIKU), is the latest in a series of significant discoveries that suggest medieval Selja was far larger and more active than previously believed.
Building archaeologist Regin Meyer, working closely with specialists in digital archaeology, identified the structure using ground-penetrating radar and advanced landscape analysis. The newly discovered feature consists of a substantial stone wall measuring approximately two metres in width and extending at least 13 metres southwards from the area near the island’s pier.
“The wall is a full two metres thick, indicating a very solid construction,” Meyer said.
Although only part of the structure has been investigated, archaeologists believe the masonry continues underground, with its full extent and purpose yet to be determined.
Mystery Structure Raises New Questions
The newly discovered building lies outside the known monastery enclosure, making it particularly significant. Researchers have not yet established whether it was connected to the Benedictine monastery, the bishopric established at Selja during the 11th century, or the island’s earliest religious settlement associated with the cult of St Sunniva.
Samples of soil and datable material have been collected from the site in the hope of determining when the structure was built and how it was used.
“We hope the analyses will help us understand both the age and function of the building, and the role it played in the development of the complex,” Meyer said.
Expanding the Story of Medieval Selja
Selja is a unique place in Norwegian history, in the municipality of Stad, Vestland County. The island was one of the first centres of Norway’s saint cult and is related to the legend of St Sunniva, who in the 10th century, is believed to have sought refuge on the island with her followers, and died as a martyr.
In the later centuries Selja became a major religious centre. According to tradition, King Olav Tryggvason built a church on the island after discovering the saint’s relics in 996. The island was later Western Norway’s first bishopric before a Benedictine monastery was established and expanded at the end of the 12th, 13th and 14th centuries.
For nearly two centuries, historians, archaeologists and conservation experts have studied the monastery and shrine complex. However, recent discoveries have demonstrated that much of Selja’s history remains hidden beneath the ground.
The latest discovery follows two other significant archaeological breakthroughs.
In 2024, researchers identified traces of an earlier stone church beneath the ruins of St Sunniva Church. The building displayed architectural features associated with Anglo-Saxon construction, raising the possibility that it could represent one of Norway’s earliest stone churches.
A year later, archaeologists located another previously unknown medieval ruin northwest of the monastery complex, revealing additional evidence of settlement beyond the well-known religious buildings.
Together with this year’s discovery, the findings suggest Selja was not simply a monastery and pilgrimage destination but a thriving medieval community with a broader range of buildings and activities.
Digital Technology Uncovers Hidden Heritage
The discoveries have been made possible through the use of advanced digital archaeological techniques, including terrain modelling, remote sensing and geophysical surveys.
Ground-penetrating radar surveys conducted in 2022 provided the first evidence of several buried structures, allowing researchers to investigate areas that had remained unexplored despite decades of archaeological study.
“Selja demonstrates that even Norway’s best-known medieval sites still hold important stories waiting to be discovered,” Meyer said.
Researchers hope future funding will allow the newly discovered structure to be fully excavated, revealing more about the people who lived, worked and worshipped on Selja during the Middle Ages.
“The discoveries show that we still know only part of Selja’s history,” Meyer said. “They offer valuable insight into the activities that took place beyond the monumental churches and monastery buildings, while raising new questions about the communities that once occupied the island.”
Header Image Credit : Manuel Gabler, NIKU
Sources : Norwegian Institute for Cultural Heritage Research (NIKU)
