| Name: | Birka and Hovgården |
| Founded: | from around AD 750 |
| Builders: | Vikings |
| Heyday: | 750 to 980 |
| Population during its heyday: | approx. 700–1,000 inhabitants (Birka) |
| Decline: | towards the end of the 10th century (Birka) |
| Building materials: | mainly wood, earth and stone, later also brick and natural stone |
| UNESCO World Heritage Site: | since 1993 |
Birka and Hovgården: Viking-Age trading town and royal estate
Location: Birka is located on the island of Björkö, while Hovgården lies on the neighbouring island of Adelsö. Both islands are situated in Lake Mälaren, west of Stockholm. A narrow stretch of water separates the former trading town from the former centre of royal power.
Significance: Birka and Hovgården are among the most important archaeological sites from Sweden’s Viking Age. Each year, up to 50,000 people visit the former trading town and the neighbouring royal estate.
Vikings: The term Viking refers to people from Scandinavia who travelled to distant regions as traders, explorers, settlers or warriors from the late 8th to the 11th century. Their fast and manoeuvrable ships could sail across open seas as well as navigate shallow rivers. This enabled them to travel enormous distances. Scandinavian groups reached the British Isles, Eastern Europe, the Byzantine Empire, the Islamic world and even North America. Most people in Scandinavia, however, continued to live as farmers, fishermen or craftspeople and never took part in raids. The Viking Age gradually came to an end as Christianity spread, stronger kingdoms emerged and Scandinavia became more closely integrated into medieval Europe.
Origins: Birka was probably founded in the second half of the 8th century as a purpose-built trading settlement. The surrounding waterways connected the town with the Swedish hinterland, the Baltic Sea and Europe’s major trade routes. At the same time, Hovgården developed into a royal residence on the neighbouring island of Adelsö.
Golden age: At the height of its prosperity, Birka was one of the most important trading centres in Northern Europe. Merchants, craftspeople and travellers from different regions gave the town an exceptionally international character for its time. Archaeological finds such as Arab silver coins, glass beads, silk, jewellery and pottery provide evidence of extensive connections with Northern and Eastern Europe, the Byzantine Empire and the Islamic world. Goods exported from Birka and the surrounding region included furs, iron, animal hides and handcrafted products. The town was also an important centre for metalworking and textile production. Combs, jewellery and beads were made there as well. At the height of its prosperity, Birka had an estimated population of between 700 and 1,000 people. The population included both free and unfree people. Written sources mention numerous Christian captives in Birka. Iron neck collars and shackles discovered at the site are also regarded as evidence of slavery and human trafficking. It is no longer possible to determine how many enslaved people lived in the town or were sold there. Hovgården, the royal seat of power, was located on the neighbouring island of Adelsö. Birka’s trade was probably organised, controlled and protected from there.
Ansgar’s mission: Around 829, the Frankish missionary Ansgar arrived in the trading town of Birka to spread the Christian faith. During his mission, one of the earliest known Christian communities in what is now Sweden was established. At first, however, Christianity attracted only a small number of followers and continued to exist alongside traditional Norse beliefs in Birka for many years. Since 1834, a large stone cross has stood at the highest point of Björkö, commemorating Ansgar’s missionary journey to Birka. The monument is accompanied by the Ansgar Chapel, which was built in 1929 to mark the 1,100th anniversary of his arrival.
Decline: Towards the end of the 10th century, Birka gradually lost its importance and was eventually abandoned. Several factors probably contributed to its decline. These included changing trade routes, political upheaval, possible attacks and the rise of Sigtuna as a new centre of power. Hovgården, by contrast, was not abandoned.
Archaeological research: Between 1871 and 1895, the Swedish archaeologist Hjalmar Stolpe carried out extensive excavations in Birka. He examined around 1,100 graves and approximately 4,000 square metres of the area known as the Black Earth, which once formed the inhabited part of the trading town. His meticulous records remain an important basis for archaeological research to this day.
Birka: The densely built-up centre of the trading town extended across an area now known as the Black Earth. Its dark soil was formed by traces of centuries of settlement. These include the remains of hearths, waste and craft production. Landing places and harbour facilities once lined the shoreline. Behind them stood houses, workshops and storage areas connected by narrow paths. A rampart marked the boundary of the town on the landward side. To the south, the Borgen hillfort stood on elevated ground. Beyond the inhabited centre were extensive burial grounds containing thousands of graves. Since the end of the last Ice Age, the land in Scandinavia, previously compressed by the immense weight of the ice sheet, has slowly been rising again. During the Viking Age, the shoreline at Birka was therefore around 5 to 6 metres higher than it is today. As a result, former harbour and shoreline areas are now located farther inland. Today, the island of Björkö covers around 4.2 square kilometres and is characterised by meadows, pastures, woodland and rocky shores. Parts of the island are protected as a nature reserve.
Borgen hillfort: Borgen hillfort stands on a rocky elevation south of Birka’s former town area. A massive rampart of earth and stone protected the site and made it an important part of the town’s defences. The hillfort probably served as a lookout point, defensive structure and possible refuge during attacks. Its elevated position offers excellent views across the former settlement area, the surrounding landscape and Lake Mälaren.
Garrison: Immediately northwest of Borgen hillfort was a fortified area that archaeologists interpret as Birka’s garrison. From the early 9th century until the middle or end of the 10th century, several buildings stood on 4 terraces. They were probably used as living quarters, storage areas, workshops and possibly weapons forges. In the 10th century, a large hall was built on one of the terraces. Because of the many weapons discovered there, it is known as the “Hall of the Warriors”. Weapons, pieces of armour and traces of a palisade or similar defensive structure suggest that the garrison played an important role in defending Birka.
Female warrior of Birka: Chamber grave Bj 581 was excavated near Borgen hillfort in 1878 and is one of the most remarkable discoveries from the Viking Age. The person buried there was accompanied by a sword, an axe, 2 spears, 2 shields, numerous arrowheads, riding equipment, a complete gaming set and 2 horses. Because of these rich grave goods, the individual was regarded as a high-ranking male warrior for more than a century. Examination of the skeleton and a later DNA analysis, however, clearly showed that the person buried there was biologically female. The grave goods strongly indicate a high-ranking military role. Whether the woman fought herself or even commanded other warriors cannot be conclusively proven.
Hemlanden burial ground: Hemlanden is Birka’s largest burial ground and contains numerous burial mounds, stone settings and less conspicuous flat graves. The different burial practices and grave goods provide important insights into the origins, social status and religious beliefs of the population at the time. The famous chamber grave Bj 581 is also located in this area.
Town rampart: The town rampart separated Birka’s inhabited centre from the surrounding burial grounds and open countryside. It consisted mainly of piled earth and was altered, extended and reinforced several times during the Viking Age. Together with a ditch that partly ran in front of it, the rampart formed the trading town’s most important landward fortification. It remains one of the clearest visible traces of the former town area.
Hovgården: Hovgården was not a densely built-up town like Birka, but a royal estate and political centre of power on the opposite island of Adelsö. The trading town’s commerce, taxes and security were probably organised from here. The estate included a harbour area, residential and agricultural buildings, and monumental burial mounds that clearly reflected the site’s high status. Hovgården remained important even after Birka’s decline. During the Middle Ages, a church, the royal palace of Alsnö hus and other structures were built there. Covering around 26 square kilometres, Adelsö is considerably larger than Björkö. Today, fields, forests, small settlements and unspoilt shores along Lake Mälaren shape the island’s peaceful landscape.
Ruins of Alsnö hus: Alsnö hus was a royal palace built of brick and natural stone. Its foundations can still be seen near the church on Adelsö. King Magnus Ladulås had the building completed in the 13th century. In 1280, an important council meeting took place there, and its decisions permanently strengthened the position of the Swedish nobility.
Royal burial mounds at Hovgården: The large burial mounds at Hovgården lie close to the former shoreline and are among the most impressive surviving traces of the royal estate. Members of the social elite or the royal household were probably buried there. Their names and exact status, however, remain unknown. The U 11 runestone stands nearby. It mentions a king and his steward, further emphasising Hovgården’s royal importance.
Largely unexplored: To date, less than 1% of the World Heritage Site has been archaeologically excavated. More than 3,000 graves are known in Birka alone, around one-third of which have been examined. Large parts of the former trading town are deliberately being left undisturbed so that they can be studied in the future using more advanced and less invasive methods. Most of the buildings were made of wood and other perishable materials that gradually decayed after Birka was abandoned in the late 10th century. The surviving remains mainly consist of postholes, hearths, soil discolourations and other traces of the former buildings. Birka therefore does not resemble a traditional ruined city, but rather an extensive archaeological landscape.
Museum and Viking village: The Birka Museum near the landing stage uses models, maps, reconstructions and selected artefacts to provide a vivid impression of the former trading town. A special section of the exhibition is devoted to people who were buried in Birka. Modern research methods have made it possible to reconstruct parts of their life stories. Next to the museum is a reconstructed Viking village with houses and workshops. It shows what the settlement may have looked like during the Viking Age. Demonstrations of traditional craft techniques also offer a vivid insight into everyday life at the time. In Hovgården, a small visitor centre provides information about the former royal estate and its historical significance. Most of the original finds from Birka are now kept at the Swedish History Museum in Stockholm. Its collection contains more than 100,000 artefacts from the island.
Names: The name Birka probably derives from the Latin form Birca, which is connected to the name of the island of Björkö. Björkö means “Birch Island”. Hovgården can be translated approximately as “royal estate” or “principal estate” and refers to the site’s role as a seat of authority.
UNESCO World Heritage Site: Birka and Hovgården have been a UNESCO World Heritage Site since 1993. The surviving ramparts, burial mounds, harbour remains and archaeological finds provide exceptional insights into trade and power structures during the Viking Age.
