800-1200ad Scandinavian (Viking) jewellery

My aim is to engage in a theoretical and practical dissertation on why Viking jewellery from 800-1200 ad looks the way it does, and how it tells the story of the people who lived in that era, because as external influences found their way into Viking culture, their jewellery was influenced accordingly. This dissertation will go through three key points of exploration; first the cultural influences found in their society, second their external influences from other societies the Vikings encountered, and thirdly their construction methods and utilization of materials.  

From Viking to crusader, Scandinavia and Europe 800-1200. Rizzoli International Publications, Inc. 1992. Page 21
Dated to the 2nd half of the 10th century this piece is a highly decorated box used to keep personal possessions , traditionally known as a 'Kunigunde's jewel box' and its stylized motifs are of the Mammen style. 

http://archaicwonder.tumblr.com/post/130512568386/viking-bronze-enmeshed-dragon-brooch-10th-century
This is a 10th century bronze dragon brooch which I chose  because it shows that even with the low technologies they had at their disposal the vikings seem to have a high level of skill in in the lost wax casting. as for the design, the use of a coiled or twisted dragon could depict the Midgard serpent who is described as a giant sea monster that grew so large that it encircled the world and grasped its own tail.  
i also chose to show this piece because it might be 

https://en.wikipedia.org/wiki/Viking_art
I chose this bronze brooch because it shows off a particular viking design style called the Borre style witch can be identified by its interlacing geometric patterns and single animal motifs.