Steiner's lectures in Heidelberg
11 lectures in 9 volumes of the collected works.
| GA | Title | When | Where | Size |
|---|---|---|---|---|
| 68a | The Essence of Christianity | 1903 to 1910 | Weimar, Leipzig, Düsseldorf | 56 lectures |
| 68c | Goethe and the Present | 1889 to 1912 | Berlin, Munich, Leipzig | 35 lectures |
| 69d | Death and Immortality in the Light of Spiritual Science | 1910 to 1914 | Munich, Vienna, Kassel | 27 lectures |
| 85 | Appendix to the Public Lectures | 1886 to 1922 | Berlin, Stuttgart, Dornach | 116 lectures |
| 97 | The Christian Mystery | 1906 to 1907 | Cologne, Leipzig, Düsseldorf | 31 lectures |
| 98 | Nature and Spirit Beings | 1907 to 1908 | Munich, Cologne, Stuttgart | 18 lectures |
| 109 | The Principle of Spiritual Economy | 1909 | Budapest, Berlin, Cologne | 21 lectures |
| 118 | The Advent of Christ in the Etheric World | 1910 | Rome, Munich, Stuttgart | 16 lectures |
| 246 | Supplements to Member Lectures | 1904 to 1924 | Dornach, Berlin, Stuttgart | 84 lectures |