G. O. Mebes
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Baron Gregory von Mёbes (1868 (Riga, Latvia, then Russian Empire) - 1930 or 1934 (Ust-Sysolsk, Russia, then Soviet Union), better known by his pseudonym G. O. Mebes, was a leader of Russian Freemasonry, Grand Lodge "Astraea", with more than 200 years of existence at that time, and the founder of the "Initiation School of Western Esotericism".