Published in German as: Mysteriengestaltungen, GA 232. <br />Reedited as: Mystery Knowledge and Mystery Centres. <br />Given in Dornach on the 7th of December 1923 by Rudolf Steiner. <br />http://wn.rsarchive.org/Lectures/GA232/English/GC1985/19231209p01.html <br />http://www.rudolfsteineraudio.com/mysterycenters1923/9mysterycenters1923.mp3 <br />http://en.wikipedia.org/wiki/Johannes_Valentinus_Andreae <br />http://en.wikipedia.org/wiki/Celtic_Christianity <br />http://en.wikipedia.org/wiki/The_Book_of_Kells
