Oslo Cathedral, faith, and the making of a plural city

Oslo Cathedral stands on Stortorvet as a witness to how faith, power, art and society have shaped – and continue to shape – the Norwegian capital. To understand its role today one must see it as part of a much longer religious landscape that stretches from Viking belief systems to a highly plural, largely secular society.

Three cathedrals

Oslo has been a bishopric for almost 900 years. During that time, the city has had three cathedral buildings. The first was St. Hallvard’s Cathedral in the medieval town, dedicated to Oslo’s patron saint. The second, Holy Trinity Church, stood in the early modern city of Christiania.

The present building, known today as Oslo Cathedral but formally named Church of Our Saviour, was completed in 1697 and still functions as the city’s main church. It serves the Royal House, Parliament and Government – and, in many moments, the nation as a whole.

The building itself carries this layered history. Constructed as a cruciform church in Dutch brick, it incorporates stone from the two earlier cathedrals, physically embedding Oslo’s religious past into its walls. Over centuries, it has been rebuilt, restored and reinterpreted, each time reflecting changing theological, political and artistic ideals.

Outside, at the base of the tower, a Romanesque stone relief from the 11th–12th century is embedded in the wall. Popularly known as “the Devil of Oslo,” the sculpture most likely originated in St. Hallvard’s Cathedral. It depicts a human figure attacked by a lion and a dragon – a visual reminder of the moral struggle for the human heart. Rather than a folkloric curiosity, it marks continuity between medieval Christian symbolism and the present church.

Ordinary people

The cathedral’s bronze entrance doors, created in 1938 by Dagfin Werenskiold, offer another key to understanding its message. The doors depict the Beatitudes from Jesus’ Sermon on the Mount, but instead of biblical figures, Werenskiold portrayed ordinary people from his own time – workers, mothers, the poor, the weary. The message is unmistakable: holiness is not reserved for saints and clergy, but found in everyday human lives.

Inside, the baroque interior unfolds as theology in wood and paint. The acanthus-carved pulpit and altarpiece reflect a European artistic tradition adapted to Norwegian craftsmanship. The altarpiece itself, completed by Norwegian artisans after a Dutch master, presents a three-part narrative: the Last Supper, the Crucifixion, and the triumphant Christ. Between the levels stand allegorical figures of Law and Gospel, reminding worshippers that Christianity speaks both of judgment and grace.

Hugo Mohr

Above it all stretches the vast ceiling painting by Hugo Mohr, covering 1,500 square metres and completed between 1937 and 1950. It is the largest ceiling painting of its kind in Norway. At its centre shines the sun with the inscription Gloria in excelsis Deo. From this source of light, the imagery spreads through the four naves of the church, structured around the articles of the Christian creed: creation, redemption and the life of the Church. The western nave, closest to the entrance, is deliberately different. Here, prophets and evangelists stand without a final, completed image of God. The story remains open, pointing outward – into the world beyond the church walls.

Iron Roses

That outward movement became especially visible after the terrorist attacks of 22 July 2011. In the days that followed, tens of thousands gathered outside Oslo Cathedral, filling the square with roses. The later memorial Jernrosene, forged by blacksmiths from around the world, now stands nearby as a permanent reminder of grief, solidarity and democratic values. In moments like these, the cathedral functions less as a denominational space and more as a shared civic and moral centre.

To place Oslo Cathedral fully in context, however, one must widen the lens. Christianity arrived in Norway gradually, beginning in the late Viking Age and becoming the official religion around 1020 under King Olav Haraldsson. The process was often violent, and for generations old Norse beliefs coexisted with Christian practices. By around 1100, permanent bishoprics were established in Oslo, Nidaros and Selja, and church-building accelerated across the country.

The Reformation of 1536–37 marked a decisive break with Roman Catholicism. Norway became a Lutheran kingdom under Danish rule, and the church was placed firmly under royal authority. For centuries, the Church functioned as a state institution, shaping education, morality and everyday life. Pietism in the 18th and 19th centuries further reinforced ideals of discipline, sobriety and personal responsibility.

This dominance has gradually faded. Over the last decades, Norway has undergone rapid secularisation alongside increased religious diversity driven by immigration and globalisation. In 2012, the formal state church system was abolished. Today, the Church of Norway governs itself, while receiving public funding on equal terms with other faith and life-stance communities.

Home to all

Oslo reflects this transformation more clearly than any other Norwegian city. It is home to all major world religions, as well as humanist, spiritual and alternative movements. Mosques, synagogues, temples, churches and secular life-stance organisations coexist within a relatively small urban area.

Alongside historic churches such as Gamle Aker, the city hosts Buddhist centres, Hindu temples, Orthodox congregations, Islamic prayer halls, and the headquarters of the Humanist Association.

In this landscape, Oslo Cathedral remains symbolically central – not because it dominates religious life, but because it connects the city’s past with its present. It reminds Oslo of its origins as a medieval Christian town, of the moral ideas that shaped Norwegian society, and of the responsibility to translate those values into a plural, democratic future.

Seen this way, Oslo Cathedral is less a monument to belief than a framework for dialogue. Its story is not finished inside the building. Like the open western nave, it continues in the streets, neighbourhoods and diverse communities of the city itself.

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Main photo: Wolfmann, CC BY-SA 4.0 – Southern facade of Oslo Cathedral (Norwegian: Oslo domkirke), a Lutheran cruciform church built 1697 (restored ca. 1850, 1950, 2010, etc.) at the Stortorvet Square in Oslo, Norway.

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