The Thule-Gesellschaft (Thule Society) was founded August 17, 1918, by Rudolf von Sebottendorff. Its original name was Studiengruppe für germanisches Altertum (Study Group for German Antiquity), but it soon started to disseminate anti-republican and anti-Semitic propaganda.
It was instrumental in the foundation of the Deutsche Arbeiter-Partei (German Workers' Party) which later became the NSDAP (Nazi Party).
It had members from the top echelons of the party, including Rudolf Hess and Alfred Rosenberg, though not Adolf Hitler. Its press organ was the Münchener Beobachter (Munich Observer) which later became the Völkischer Beobachter (People's Observer).
The symbol associated with the Thule group was a dagger.http://www.crystalinks.com/thule.gif

The Thule Society had a number of highly positioned individuals in the Nazi party, although Hitler himself never became a member. However, it was a member of the Thule Society, dentist Dr. Friedrich Krohn, who designed the swastika flag of the Nazi party.

Perhaps the most significant Thule influence on Hitler came from Dietrich Eckart. Eckart was the wealthy publisher of the newspaper, In Plain German. He was a committed occultist as well as a member of the Thule Society's inner circle. While no direct connection between Eckart and Hitler has been documented, he is believed to have taught Hitler a number of persuasive techniques (some possibly mystical in nature). So profound was the influence, that Mein Kampf was dedicated to Eckart.

The Thule Society is known to be closely connected to the Germanenorden secret society.

Germanenorden
In 1912 a group of German mystics formed the Germanenorden (Order of the Teutons). The Germanenorden was a secret society based on proof of Aryan ancestry. Formed by several prominent German occultists in 1912, the order, whose symbol was a swastika, had a hierarchical fraternal structure similar to freemasonry. It taught to its initiates nationalist ideologies of nordic race superiority, antisemitism as well as occult, almost magical philosophies. Some say that the Deutsche Arbeiter-Partei (later the Nazi Party) when under the leadership of Adolf Hitler was a political front, and indeed the organisation reflected many ideologies of the party, inclu
ing the swastika symbol. :swast:

The Vril Society
The Vril Society, or Luminous Lodge, has no documented activities until 1915, but is believed to have been founded by Russian magician and metaphysician Gergor Ivanovich Gurdyev (also known as George Gurdjieff). The Vril Society was founded to explore the origins of the Aryan race. The Society taught exercises in concentration designed to awaken the forces of Vril. Members of the Vril Society are believed to have included Hitler, Alfred Rosenberg, Heinrich Himmler, Hermann Göring and Hitler's personal physician Dr. Theodor Morell.