The Viking Age was a period of considerable religious change in Scandinavia. Part of the popular image of the Vikings is that they were all pagans, with a hatred of the Christian Church, but this view is very misleading. It is true that almost the entire population of Scandinavia was pagan at the beginning of the Viking Age, but the Vikings had many gods, and it was no problem for them to accept the Christian god alongside their own. Most scholars today believe that Viking attacks on Christian churches had nothing to do with religion, but more to do with the fact that monasteries were typically both wealthy and poorly defended, making them an easy target for plunder.
The Vikings came into contact with Christianity through their raids, and when they settled in lands with a Christian population, they adopted Christianity quite quickly. This was true in Normandy, Ireland, and throughout the British Isles. Although contemporary accounts say little about this, we can see it in the archaeological evidence. Pagans buried their dead with grave goods, but Christians normally didn't, and this makes it relatively easy to spot the change in religion.
As well as conversion abroad, the Viking Age also saw a gradual conversion in Scandinavia itself, as Anglo-Saxon and German missionaries arrived to convert the pagans. By the mid-11th century, Christianity was well established in Denmark and most of Norway. Although there was a temporary conversion in Sweden in the early 11th century, it wasn't until the mid-12th century that Christianity became established there. As part of the process of conversion the Christians took over traditional pagan sites. A good example of this can be seen at Gamle Uppsala in Sweden, where the remains of an early church stand alongside a series of huge pagan burial mounds.
There is little contemporary evidence, and although there are occasional references to paganism in the Viking sagas – mostly composed in Iceland in the 13th century – we have to remember that these were written down 200 years after the conversion to Christianity. We know that chieftains also had some sort of role as priests, and that pagan worship involved the sacrifice of horses, but not much more.
We know rather more about the stories associated with the pagan gods. Besides occasional references in early poems, these stories survived after conversion because it was possible to regard them simply as myths, rather than as the expression of religious beliefs. The main sources of evidence are the Eddas, wonderful literary works which represent the old pagan beliefs as folk tales. Even here there is some Christian influence. For example, the chief god Odin was sacrificed to himself by being hanged on a tree and pierced in the side with a spear, and this was followed by a sort of resurrection a few days later – a clear parallel with Christ's crucifixion.
Even so, the Eddas provide a huge amount of information about the gods, and their relationship with giants, men and dwarfs. The most powerful god was the one-eyed Odin, the Allfather, god of warfare, justice, death, wisdom and poetry. Probably the most popular god, however, was Thor, who was stupid but incredibly strong. With his hammer Miollnir, crafted by the dwarfs, he was the main defender of the gods against the giants. He was also the god of thunder, and he was particularly worshipped by seafarers. Amulets of Thor's hammer were popular throughout the Viking world. The brother and sister Freyr and Freyja, the god and goddess of fertility, were also important, and there were many other minor gods and goddesses.
The Vikings told many stories about gods, giants, trolls and dragons. They were full of magic, adventure, trickery, and mischief. They describe people living in Midgard (Middle Earth), gods and godnesses living in a sky world called Asgard. A beautiful rainbow bridge connected Midgard and Asgard.
The Vikings believed that men who died in battles went to Valhalla, where dead heroes feasted with the gods.
The great enemies of the gods were the giants, and there were often conflicts between the two races.
Freyr. The god associated with sacral kingship, virility and prosperity, with sunshine and fair weather, and was pictured as a phallic fertility god
Among the gods, only Thor was a match for the giants in strength, so the gods usually had to rely on cunning to outwit the giants.
Odin himself was capable of clever tricks, but whenever the gods needed a really cunning plan, they turned to the fire-god Loki. Like fire, which can bring necessary warmth or cause great destruction, Loki did many things that benefited the gods, but he also caused them great harm, and often the problems he solved had been caused by his mischief in the first place.
Despite the tension between gods and giants, there was a fair amount of contact on an individual basis, and a number of the gods had relationships with giantesses. One of these was Loki, who had three monstrous children by his giantess wife. His daughter Hel became ruler of the underworld. One son, Jormunagund, was a serpent who grew so large that he stretched all the way around the earth. The other son was Fenris, a wolf so powerful that he terrified the gods until they tricked him into allowing himself to be tied up with a magical chain which bound him until the end of time.
It was believed that the world would end with the final battle of Ragnarok, between the gods and the giants. Loki and his children would take the side of the giants. Thor and Jormunagund, who maintained a long-running feud with each other, would kill each other, and Odin would be killed by the Fenris wolf, who would then be killed in turn. A fire would sweep across the whole world, destroying both the gods and mankind. However, just enough members of both races would survive to start a new world.
The Scandinavian thought that the world was full of creatures, which had influence on life and destiny of a man. They should behave themselves correctly, made honors to the Gods and other supernatural creatures, giving them what they owned. They spun yarn inevitable fate of man.
There was a great public gathering of the Sweys and the Goths in Uppsala cathedral every 9 years, with the King as a Head. The faith in souls of ancestors was an important part of the national religion. Bishop Wordsworth said: “Every elder was the priest of his family, like a King, who was the nationwide priest. Polygamy was not forbidden. The deceased people were buried near their houses and the graves were a place of worship and meditation. In these family sanctuaries (they called them “howes”), traditionally, elders were sitting and talking to the spirits of the dead. These temples were as well the places for different games and tilt yards”.