Manly Palmer Hall was a prolific writer and mystic, widely recognized as a leading scholar in the fields of religion, mythology, mysticism, and the occult. “The Pythagorean Theory of Music and Color” is the article, included in “The Secret Teachings of All Ages” volume and dedicated to the Pythagorean concept of the harmony. He searched for musical and color harmony, for he believed they are both an essential part of the expression of universal harmony. Harmony is also viewed it as a state preceded the beauty. We present you the book, filled with mysteries and secrets of world history, so it is absolutely must-read for everyone, who is interested in mythology, history, philosophy, religion and other aspects of human culture. Enjoy the reading!