http://www.stavinternational.org/what.htm

What is Stav?
Stav is a traditional European mind/body/spirit training system. Its origins are lost in the mists of time but the Hafskjold clan can trace their history back to at least 500 AD when the Hoskols became established at Drammensfjord in South Eastern Norway.

Just like a crystal, Stav has many facets. Generally speaking it is the educational system of the Hoskoll clan covering all aspects that was neccessary for the clan to survive, like crafts, warfare and healing. It also encompasses things like skiing, hawking, hunting, horsemanship and sailing. Furthermore it is a philosophical system that has preserved the thoughts and religious practices of Dark Age North-European society and as such is a treasure trove for scientific study. See below for more detailed explanation.

Some links
http://www.stavinternational.org/
http://www.stavacademy.co.uk/mimir/
http://www.geocities.com/Athens/Atlantis/6689/
http://www.markalex.pidd.cwc.net/stav/contents.htm
http://www.einherjarve.org.uk/contents.htm