Thank you, Bella!

It was a pain to draw, but luckily, I had a good reference, a picture of a brooch in the same style in a book I have, "The Cultural Atlas of the Viking World". This style is called Urnes style, the very last style of the Viking art styles. Here's a link, it on the wall of a Stave Church here in Norway:
http://en.wikipedia.org/wiki/Viking_art#/media/File:La_pared_original_de_la_Urnes_stavkyrkje_(I).jpg