Chapter 11 of 12 · c. 950–1035
Crosses and crowns
The making of kingdoms
The later Viking Age saw increasingly powerful kings and the expansion of Christianity. Neither change happened in a single moment. New institutions developed through old networks of authority, international connections, conflict and local choices.
1Conversion over generations
Scandinavians encountered Christianity through merchants, travellers, missionaries, captives and communities abroad. A ruler’s baptism could support alliances and provide a language of legitimate kingship, but personal belief cannot always be separated from political advantage in surviving accounts.
At Jelling, Harald Bluetooth’s great runestone proclaimed that he made the Danes Christian, around the 960s. That declaration is evidence of royal ambition as well as religious change.
Christianity already had a history in the region, and its practices did not instantly become uniform. Churches, burial customs and religious objects show a gradual transformation with differing local rhythms.
2Building power on the ground
Harald’s reign also saw the construction of geometrically planned ring fortresses in Denmark around 970–980. Their scale and shared design indicate the ability to organise people and resources across a wide area.
Their exact functions remain debated, so neat modern labels should not replace archaeological uncertainty. In Norway, competing rulers sought authority across regions while promoting Christianity; in Sweden, consolidation and conversion likewise extended beyond a single royal decision.
Emerging kingdoms did not abolish local interests. They changed the balance between rulers, powerful families, assemblies and the growing Church, while also drawing Scandinavia more deeply into European political relationships.
3A Christian North Sea king
Cnut became king of England in 1016 and subsequently ruled Denmark and Norway. His power demonstrates how a ruler of Scandinavian origin could operate as a Christian monarch within established kingdoms.
Such dominion relied on negotiation, officials, elite cooperation and force, rather than creating one uniform modern state. In Iceland, the assembly’s acceptance of Christianity is traditionally dated to 1000, though 999 is also used in scholarly chronologies.
The later account presents agreement as a way to preserve common law amid division. Across these different settings, conversion reshaped institutions and cultural production; it did not erase Scandinavian identity, seafaring or competition for power.