During this period, Duhm says that he found inspiration in the works of Nietzsche, Hegel, van Gogh, Rudolf Steiner, Jesus, Laozi, Prentice Mulford, and Teilhard de Chardin; and he spent time in the Aktionsanalytische Organisation (AAO) with Otto Muehl at the Friedrichshof community in Austria, and with Bhagwan Shree Rajneesh in India.
Schlosshotel Kronberg in Kronberg im Taunus was built between 1889 and 1893 for the dowager German Empress Victoria, Princess Royal and originally named Schloss Friedrichshof in honour of her husband, Frederick III, German Emperor.