The Theosophical Society is an organization formed to advance the spiritual principles and search for Truth known as Theosophy. The Theosophical Society was founded in New York City, USA, in 1875 by H.P. Blavatsky, Henry Steel Olcott, William Quan Judge and others. Its initial objective was the investigation, study and explanation of mediumistic phenomena. After a few years Olcott and Blavatsky moved to India and established the International Headquarters at Adyar, Madras (Chennai). There, they also became interested in studying Eastern religions, and these were included in the Society's agenda. After several iterations the Society's objectives have evolved to be: