Walhalla-orden was a secret society founded in the early part of 1783 in the Sveaborg (today, in Finnish: Suomenlinna) fortress outside Helsinki, Finland by Johan Anders Jägerhorn along with Gustaf Adolf Reuterholm.
The Walhalla-orden originally was preceded by a lodge taking the name of an early ancestor of Jägerhorn, namely Rutger Ingesson, who according to legends inspired by the Song of Roland was a crusader knight in the troops of Erik the Holy.
The society began on a strict loyalist foundation and stayed nominally in support of the constitution, but after a short time its membership became primarily composed of officers stationed there who had a grievance with Gustav III.
This assumption is supported by the fact that nearly all of the people implicated in the Anjala conspiracy, including its leadership, were members of it.
[2] Though only few fragments of encrypted correspondence remain, and the archives were burned to protect the members later implicated in what the crown considered to be nefarious plots, such as the Anjala conspiracy, it is thought that the meetings of the Walhalla-orden may have been the first discussions in which Finnish independence was proposed as a serious idea.