Steiner's lectures in Bonn
5 lectures in 5 volumes of the collected works.
| GA | Title | When | Where | Size |
|---|---|---|---|---|
| 68a | The Essence of Christianity | 1903 to 1910 | Weimar, Leipzig, Düsseldorf | 56 lectures |
| 68b | The Circular Flow of Man's Life | 1904 to 1910 | Cologne, Berlin, Munich | 55 lectures |
| 68c | Goethe and the Present | 1889 to 1912 | Berlin, Munich, Leipzig | 35 lectures |
| 85 | Appendix to the Public Lectures | 1886 to 1922 | Berlin, Stuttgart, Dornach | 116 lectures |
| 246 | Supplements to Member Lectures | 1904 to 1924 | Dornach, Berlin, Stuttgart | 84 lectures |