The History of Trondheim: Vikings, Christianity & World War II
The History of Trondheim
Trondheim is one of Norway’s most important historic cities. The history of Trondheim is like reading from the Norse sagas. It was inhabited during the Viking Age and was chosen as the place where the Vikings, who were raised in England under Catholicism, would land in an attempt to Christianise the pagan Norwegians. There are two Olavs accredited with this – who you’ll learn about below – and today one of them is buried under Nidaros Cathedral, one of Norway’s most important churches. After suffering fire after fire, the city became less important, but today it is noted for its prestigious University and fascinating town centre.
Here’s my summary of the history of Trondheim: everything you need to know before you go.
In this article...
The E6 Highway
Trondheim is located on the E6, Norway’s main highway. You can find my guide to the E6 by clicking the link below.
Norway's Coastal Ferry
Tromsø is a port of call of Norway’s coastal ferry. Find my guide for the coastal ferry by clicking the link below.
The pre-history of Trondheim
The history of Trondheim begins thousands of years ago. People have lived here since the BCs, as evidenced by the 300+ rock carvings that have been found in the area. They depict not just the animals of the region (elk, red deer, halibut, salmon, etc), but also show people gathering, hunting and fishing.
Before Trondheim was officially founded, the area was known as Øretinget. An Øretinget is an assembly for representatives from each reason, who would meet to award legal judgements and pass laws. It eventually developed into an assembly where the King of Norway was proclaimed, and it’s believed that Harald Fairhair was proclaimed at this assembly.
The Early Years & Battle for Christianity
Trondheim was officially founded in the year 997 by Olav Tryggvason (960s-1000), a Viking King who had returned from England to Christianise Norway. He established Nidaros, as the town was called, on the edge of the river Nid, which twists around the peninsula before emptying into the fjord.
Olav’s goal was to resist and Christianise the pagans, which was the main religion at the time. While he did find some success, he was killed in the Battle of Svolder in 1000.
Olav Haraldsson (St. Olav)
Shortly after Olav Tryggvason’s death, another Olav decided to become king of Norway. A descendent of the first King Harald Fairhair, Olav Haraldsson had been a Viking since the age of 12, travelling throughout Northern Europe. He returned to Norway in 1015 to establish himself as the King in Trondheim. To cement this title, he built himself a wooden church, St. Clemens, shortly after.
Olav II also wanted to Christianise Norway, but he had a slightly different approach than Olav I. His approach was to travel to the small villages, meet the locals, and tell them to become Christian or he’ll kill them. This brutal plan was effective; once a village knew that Olav II was visiting, they’d quickly build a Christian church over their old pagan worshipping site. Many of these churches are stave churches: Catholic wooden churches with pagan motifs on them.
Eventually, and perhaps unsurprisingly, Olav II’s methods made some wealthy pagans angry. Olav was forced to flee to Russia in 1028 but decided to come back to Trondheim the following year. As he was making his return, he was met by the angry pagans in Stiklestad (95km/51 miles away), who killed him in the
Battle of Stiklestad in 1030.
Stiklestad
I visited Stiklestad in 2021 and wrote about all the places you can visit that relate to this famous battle and st. Olav. You can read my guide to Stiklestad below.
St. Olav & the First Church Construction
After he died, his followers secretly took Olav’s body to Trondheim and buried him somewhere near the present-day Nidaros Cathedral. Strange things began to happen. There was an eclipse of the sun, and a spring came from his grave that was believed to have healing powers. Some of Olav’s blood was placed in a blind man’s eye and the man’s vision was restored.
Several months after this death, Olav’s body was exhumed and his hair, beard and nails were seen to have grown. By this point, Olav had a large following – the Cult of Olav – and this following not only unified the country, but it also Christianised it. While Olav wasn’t around to see it, he had succeeded in Christianising Norway. His casket was placed into Kristkirken (Christ Church) in 1070 and Olav was canonised as the Saint of Norway.
The Norwegian Civil War
Trondheim quickly developed as a major religious centre, furthered by the fact that it became the episcopal seat in 1080, and pilgrims from Europe started coming to visit St. Olav’s Casket at Kristkirken, which later became known as Nidaros Cathedral. The church was continuously extended throughout the 12th century, and officially completed in 1320 (it burned down a few years later, though, kickstarting centuries of rebuilding and burning down). The Archbishops Palace was constructed in 1152 as the religious and political centre of the Kingdom of Norway, which not only included Norway but also the Faroe Islands, Shetland, Isle of Man, Iceland and Greenland.
Reformation and Danish Union
While Norway had not been a truly independent country since 1380 due to the Kalmar Union, it was the Reformation in 1536/7 that reconfirmed Norway as a Danish territory under Danish rule. Norway, a catholic country at the time, was forced to convert to the Lutheran (Protestant) religion after the Danish king adopted the doctrine of Lutheran. Many old Catholic churches were torn down to make way for new Lutheran churches, and many historic buildings were left untouched, eventually deteriorating into ruin. As Nidaros Cathedral and the Archbishops were symbols of the Catholic religion, the Danes prevented any repairs done to the cathedral after a major fire, and the Palace was turned into a military base. The last Catholic bishop of Trondheim, Olav Engelbrektsson, fled to the Netherlands. Olav’s casket, as well as most items in the church, were taken by the Danes and melted to be made into coins.
The Many Wars with Sweden
You’ll notice as you walk around that Trondheim has lots of timber buildings. Due to the proximity of forests, the main building material has always been timber. This, of course, means that Trondheim has also caught fire many times. The first major fire was in 1295 when much of the town and the Episcopal Palace was destroyed. In 1328, just 8 years after the 150-year construction of Nidaros Cathedral ended, the church burned down. It had been richly decorated and was regarded as Norway’s finest and most holy palace. A complete restoration was carried out, but a new fire in 1432 caused considerable damage. The town was destroyed by fire in 1531, but at this time the rebuilding was greatly limited. After the Reformation in 1537, the church now lacked importance. Parts of the church were left without a roof and stood in ruins for almost 400 years.
The most famous fire is the fire of 1681 when the town once again burned down. This caused the citizens to rethink how they built the town, and the town planner General John Caspar de Cicignon (1625-1696) from Luxembourg was called to Trondheim to redesign the city with fire prevention in mind. He adopted a grid system with wide, open streets and a quadratic layout. It is regarded as the finest example of a Baroque town plan in Norway and is the layout you’ll see today.
Still, it wasn’t fireproof. In 1708, the town was ravaged by fire. Nidaros Cathedral was destroyed – only the stone walls remained. Restoration of the church was only just completed when it was again struck by lightning in 1719. The church was rebuilt once again, but this time in a very simple design; for example, a simple pyramid-shaped roof was constructed over the old tower and the octagonal chancel was crowned by a dome in the Baroque style.
Several more fires occurred between 1788 and 1842. The street plans changed slightly to try and stop fire jumping, and in 1845 a new rule was introduced that said all buildings had to be built in stone. The locals were surprisingly stubborn about this and insisted on building in wood. They wanted Trondheim to always be a ‘timber town’. After a fire in 1899, they decided that maybe Trondheim should be built in stone. A brick law was enforced.
The City Fires
The 16th and 17th century in Scandinavian history is typically characterised by the many battles between Denmark/Norway and Sweden. As Trondheim is close to the Swedish border, the town became involved in some of these battles. In the Seven-Year War, which lasted between 1563 and 1570, the Swedish Army entered Trondheim and laid siege to the town for two months. During a new war in the years 1567/58 that was won by Sweden, the country of Trøndelag was ceded to the Swedes, though it was only Swedish territory for several months. The Norwegians built Kristiansten Fortress to defend themselves against the Swedes.
19th Century Industrial Growth
Trondheim has always been a major industrial centre for timber, mining and brickworks. The first brick factory opened in the 1200s (and yet it took them over 600 years to decide to use it as a building material), and timber factories existed along the river. The modern industry arrived in the 19th century with the construction of a textiles factory near the river in 1843. Between 1842 and 1870 there was considerable economic development in Trondheim; several businesses that used manual labour became industrialised. The towns commercial and industrial enterprises followed the international trends, with considerable development around the time of the First World War and the depression between the wars.
World War II
Like the other major cities in Norway, Trondheim was occupied on the 9th of April 1940 by German forces. The heavy cruiser ‘Admiral Hipper’ and four destroyers were anchored in the harbour, and 1,700 German troops oversaw the occupation. Trondheim was of strategic importance to the Germans; it was considered the ‘gateway’ to Northern Norway and the Trondheimsfjord provided a haven for German ships preparing to attack the Allied convoys heading for Murmansk. The Germans built U-boat pens along the harbour, a major defence fort at Munkholmen, and coastal forts along the fjord.
Resistance groups and martial law
A strong resistance group was active in Trondheim, working with the British via secret radio transmission and distributing illegal newspapers. Their acts of resistance eventually angered the German Reichskommissar Josef Terboven, who decided to implement martial law in the city. He arrived in Trondheim on the 5th of October 1942, and by the 6th of October there were signed all over the city notifying citizens of the ‘martial law’. The conditions for martial law included a curfew from 8pm to 5am, a general prohibition against the use of railroads for transport, and a prohibition against gatherings. Violations were to be punished with no less than 10 years’ imprisonment at hard labour camps or with capital punishment. 13,000 police officers were mobilised to enforce the law.
Terboven announced to the civilians from the town square that 10 prominent citizens of Trondheim had been executed as ‘atonement sacrifices’. A well-known concentration camp was situated just north of Trondheim, called Falstad, and nearby was the Falstadskogen (Falstad Woods), which were known as a killing ground. When Terboven made the announcement, eight of the citizens hadn’t been executed yet. Rather, they were being held at the Gestapo Headquarters at Misjonhotellet and had heard the announcement of their deaths. They were taken to Falstadskogen, blindfolded, and placed two by two in a mass grave. They were shot at short range by a firing squad of 10.
In the following two days, an additional 24 residents were arrested and executed. A dozen or so Jewish men were arrested, 1,434 properties were raided, and 93 Norwegian individuals were arrested. Everyone killed or arrested had some connection to the Norwegian resistance or was just a well-liked member of society whose arrest was to ‘send a message’. Martial law was lifted on the 12th of October once Terboven was confident he had stopped the resistance. However, these measures did little to stop the Norwegians. Rather, they only grew stronger, more organised and coordinated.
The Jewish population of Trondheim
There was intense persecution of the Trondheim Jewish population that began at the local synagogue before spreading throughout the rest of the country. The Trondheim Synagogue was confiscated in April 1942, and in autumn that year Ernst Flesch, a ruthless anti-Semite, had become the commander of the Security Service for Trondheim. By summer 1942, he had taken over almost all business owned by Jews and had arrested the owners. The arrested and executed another four Jews for listening and spreading Norwegian news from London. In October 1942, the remaining Jews were arrested – this was the first city in the country to carry out the mass arrests. By November 1942, all Jews in Trondheim had been arrested and deported, where they would all be killed at a concentration camp, or they were imprisoned in a Norwegian concentration camp. Only a few managed to escape to Sweden.
Falstadskogen
You can read my article about the Falstad Centre & Forest via the link below.
Trondheim Today
Today, Trondheim is Norway’s third-largest city and is often referred to as the ‘technology capital’ of the country. This can be attributed to the large number of start-up companies that can be found in the city, but also because of the university the Norwegian University of Science and Technology (NTNU). Universities came to Norway late due to the Danish union (if you wanted an education back then, you had to go to Copenhagen). The first college in Trondheim was founded in 1760 as the ‘Det. Kgl. Norske Videnskabers Selskab’, or the Royal Scientific Society. The Norwegian Technical College opened in 1910. Throughout the 20th century, colleges for Arts and Sciences and Medicine opened.
NTNU University
In 1996, all of these colleges were brought together and became NTNU. NTNU has a professional basis in education and research, social sciences, humanistic sciences, scientific objects, medicine, architecture and art.
There are approximately 36,000 university or college students in Trondheim. The students are particularly known for their volunteer work, and the student society is run by more than 1,200 volunteers. NTNU is also known for closely collaborating with industries and has some of the closest industrial links in the world. NTNU is famous for its research, and there are 4,500 scientific staff and at any time the university is running more than 2000 research projects. In 2017, NTNU was ranked first in the world for universities with corporate links. Many of its Master and PhD programmes are in English, and NTNU offers a free Norwegian language course online if you are interested in learning.
In 2014, Professors May-Britt Moser and Edvard Moser at NTNU were awarded the Nobel Prize in Physiology or Medicine for their discoveries of how the brain creates a map of space around us to navigate complex medical surroundings. They share the award with John O’Keefe of the University College London.
Scientific Institutions & Sport
St. Olav’s Hospital is one of the major university hospitals in the country. The hospital has 8,69 employees and treats 725,000 patients every year. It specialises in back injuries and neuroscience.
There are several scientific organisations in Trondheim. One of them is SINTEF, the largest independent research organisation in Scandinavia. Of their 1,800 employees, 1,300 of them are located in Trondheim. The Geological Survey of Norway is also located in Trondheim and is a major geoscientific institution with 220 employees of which 70% are scientists.
Trondheim is regarded as the cross-country ski capital of Norway due to the fact its produced so many Olympians. The Granåsen Ski Centre is a major Nordic skiing venue that regularly hosts competitions. Trondheim is also known for its football club Rosenborg, which has won the Norwegian Premier League 26 times between 1967 and 2018 and has reached the UEFA Champions League group stage 12 times.
The E6 Highway
Trondheim is located on the E6, Norway’s main highway. You can find my guide to the E6 by clicking the link below.
Norway's Coastal Ferry
Tromsø is a port of call of Norway’s coastal ferry. Find my guide for the coastal ferry by clicking the link below.
