Conversation so far:
Who founded the Anthroposophical Society?
Rudolf Steiner and the majority of members of the German section of the Theosophical Society broke off to form a new group, the Anthroposophical Society
Where did the Anthroposophical Society get started?
The Anthroposophical Society was founded in Cologne, Germany, with about 3000 members.
When was the Anthroposophical Society founded?
The Anthroposophical Society was founded on December 28, 1912 in Cologne, Germany, with about 3000 members.
What was the purpose of the Anthroposophical Society?
As an organization, it is dedicated to supporting the community of those interested in the inner path of schooling known as anthroposophy, developed by Rudolf Steiner.
Are there any other interesting aspects about the Anthroposophical Society besides the purpose of the organization to support the community, when it was founded, where it was founded, and who founded it?
The Anthroposophical Society grew rapidly. The decision was made to build a theater and organizational center.
What war was taking place during creation of the Anthroposopical Society's theater and organizational center?
Once World War I started in 1914, the volunteers could hear the sound of cannon fire beyond the Swiss border.
Who were the members of the Anthroposophical Society?
The members of its original Executive Council were Marie von Sivers, Michael Bauer, and Carl Unger.
What is the Anthroposophical Society famous for?
Did the Anthroposopical Society ever get recognized for awards?

Question: What did Steiner work on with other members?
Self-contained rewrite: What did Rudolf Steiner work on with other members of the other members of the Anthroposophical Society?