Rudolf Steiner in the context of "Goetheanum"

Ignatius Loyola Donnelly (November 3, 1831 – January 1, 1901) was an American Congressman, populist writer, and pseudoscientist. He is known primarily now for his fringe theories concerning Atlantis, Catastrophism (especially the idea of an ancient impact event affecting ancient civilizations), and Shakespearean authorship. These works are widely regarded as examples of pseudoscience and pseudohistory. Donnelly's work corresponds to the writings of late-19th and early-20th century figures such as Helena Blavatsky, Rudolf Steiner, and James Churchward.

Anthroposophy is a spiritual new religious movement which was founded in the early 20th century by the esotericist Rudolf Steiner that postulates the existence of an objective, intellectually comprehensible spiritual world, accessible to human experience. Followers of anthroposophy aim to engage in spiritual discovery through a mode of thought independent of sensory experience. Though proponents claim to present their ideas in a manner that is verifiable by rational discourse and say that they seek precision and clarity comparable to that obtained by scientists investigating the physical world, many of these ideas have been termed pseudoscientific by experts in epistemology and debunkers of pseudoscience.

Anthroposophy has its roots in German idealism, Western and Eastern esoteric ideas, various religious traditions, and modern Theosophy. Steiner chose the term anthroposophy (from Greek ἄνθρωπος anthropos-, 'human', and σοφία sophia, 'wisdom') to emphasize his philosophy's humanistic orientation. He defined it as "a scientific exploration of the spiritual world"; others have variously called it a "philosophy and cultural movement", a "spiritual movement", a "spiritual science", "a system of thought", "a speculative and oracular metaphysic", "system [...] replete with esoteric and occult mystifications", or "a spiritualist movement", or folie a culte, or "positivistic religion", or "a form of 'Christian occultism'", or "new religious movement" and "occultist movement".

Expressionist architecture was an architectural movement in Europe during the first decades of the 20th century in parallel with the expressionist visual and performing arts that especially developed and dominated in Germany. Brick Expressionism is a special variant of this movement in western and northern Germany, as well as in the Netherlands (where it is known as the Amsterdam School).

Boris Nikolaevich Bugaev (Russian: Бори́с Никола́евич Буга́ев, IPA: [bɐˈrʲis nʲɪkɐˈlajɪvʲɪdʑ bʊˈɡajɪf] ; 26 October [O.S. 14 October] 1880 – 8 January 1934), better known by the pen name Andrei Bely or Biely, was a Russian and Soviet novelist, Symbolist poet, theorist and literary critic. He was a committed anthroposophist and follower of Rudolf Steiner. His novel Petersburg (1913/1922) was regarded by Vladimir Nabokov as the third-greatest masterpiece of modernist literature. The Andrei Bely Prize (Премия Андрея Белого), one of the most important prizes in Russian literature, was named after him. His poems were set to music and performed by Russian singer-songwriters.

Nachlass (German pronunciation: [ˈnaːxlas], older spelling Nachlaß) is a German word, used in academia to describe the collection of manuscripts, notes, correspondence, and so on left behind when a scholar dies. The word is a compound in German: nach means "after", and the verb lassen means "to leave". The plural can be either Nachlasse or (with Umlaut) Nachlässe. The word is not commonly used in English; and when it is, it is often italicized or printed in capitalized form to indicate its foreign provenance.