User blog comment:Dragonfighter1/Relationship between Wesen Council, Royals and the Verrat/@comment-1752998-20130422005612/@comment-1752998-20130422010614

The Council of Walenstadt takes place in 1521, so I'm guessing that is about when they formed as it mentions that "...it establishes guidelines to ensure the safety and well-being of the Wesen Community.".