Norse or Scandinavian mythology comprises the myths of North Germanic pre-Christian religion. Most of the written sources for Norse mythology were assembled in medieval Iceland in Old Norse, notably as the Edda. Norse mythology is the best-preserved version of wider Germanic paganism, which also includes the closely related Anglo-Saxon and Continental varieties.
Germanic mythology can be shown to preserve certain aspects attributed to common Indo-European mythology. Norse mythology has its roots in Proto-Norse Iron Age Scandinavian prehistory. It flourishes during the Viking Age and following the Christianization of Scandinavia during the High Middle Ages passed into Scandinavian folklore, some aspects surviving to the modern day.
The mythology from the Romanticist Viking revival came to be an influence on modern literature and popular culture.
Yes, I know the Kraken tale originated in Scandinavia, but _Clash Of the Titans_ (1981) has me thinking about the Kraken as well as Greek mythology. Blame Beverly Cross.