information:classification, linguistic:paraphrasing
Medieval perceptions

In England the Viking Age began dramatically on 8 June 793 when Norsemen destroyed the abbey on the island of Lindisfarne. The devastation of Northumbria 's Holy Island shocked and alerted the royal courts of Europe to the Viking presence. "Never before has such an atrocity been seen", declared the Northumbrian scholar Alcuin of York. Medieval Christians in Europe were totally unprepared for the Viking incursions and could find no explanation for their arrival and the accompanying suffering they experienced at their hands save the "Wrath of God". More than any other single event, the attack on Lindisfarne demonised perception of the Vikings for the next twelve centuries. Not until the 1890s did scholars outside Scandinavia begin to seriously reassess the achievements of the Vikings, recognising their artistry, technological skills, and seamanship.

Norse Mythology, sagas, and literature tell of Scandinavian culture and religion through tales of heroic and mythological heroes. Early transmission of this information was primarily oral, and later texts relied on the writings and transcriptions of Christian scholars, including the Icelanders Snorri Sturluson and Sæmundur fróði. Many of these sagas were written in Iceland, and most of them, even if they had no Icelandic provenance, were preserved there after the Middle Ages due to the continued interest of Icelanders in Norse literature and legal codes.

The 200-year Viking influence on European history is filled with tales of plunder and colonisation, and the majority of these chronicles came from western European witnesses and their descendants. Less common, although equally relevant, are references to Vikings in chronicles that originated in the east, including the Nestor chronicles, Novgorod chronicles, Ibn Fadlan chronicles, Ibn Rusta chronicles, and brief mentions by Photius, patriarch of Constantinople, regarding the first Viking attack on the Byzantine Empire. Other chroniclers of Viking history include Adam of Bremen, who wrote, in the fourth volume of his Gesta Hammaburgensis Ecclesiae Pontificum, "here is much gold here (in Zealand), accumulated by piracy. These pirates, which are called wichingi by their own people, and Ascomanni by our own people, pay tribute to the Danish king." In 991, the Battle of Maldon between Viking raiders and the inhabitants of Maldon in Essex was commemorated with a poem of the same name.