The Viking Age in Scandinavian history as well as in England is considered to have begun dramatically on June 8, 793 CE when Norsemen destroyed the abbey on the island of Lindisfarne. It is a tidal island off the northeast coast of England. The raid caused considerable conservation throughout the Christian west. A description of the raid is recorded in the ‘History of the Church of Durham’ by the monk Simeon.

Also at the time, Alcuin a Northumbrian scholar in Charlemagne’s court wrote: “Never before has such terror appeared in Britain as we have now suffered from a pagan race…The heathens poured out the blood of saints around the altar and trampled on the bodies of saints in the temple of god, like dung in the streets.’”

The abbey was a center of learning on the island, also called the Holy Island of Lindisfarne or simply Holy Island. It was an important center of Celtic Christianity under Saints Aidan, Cuthbert, Eadfrith and Eadberht.

Called Norsemen, they are also known by the modern name of Vikings, a seafaring people primarily from Scandinavia, that includes present-day Denmark, Norway and Sweden. From the late 8th century to the late 11th century, they raided, pirated, traded and settled throughout parts of Europe. History documents that the Vikings voyaged as far as the Mediterranean, North African, the Middle East, and North America.

The Vikings spoke Old Norse and made inscriptions in runes, considered a type of alphabet.

More Info: en.m.wikipedia.org