Agrippa von Nettesheim (16th century) considered letters and symbols to have a real, living celestial correspondence, so they could therefore be used to manipulate the higher powers of the celestial forms they represented. This table shows his magical numerology for the rays of the Sun, and the magical symbols that might be derived. Thirty years later, John Dee further developed these ideas in his Monas Hieroglyphica (1564).
Image from:
Heinrich Cornelius Agrippa von Nettesheim (ca. 1486-1535 A.D.)
De occulta philosophia libri tres / Three Books of Occult Philosophy
1651 Edition, Harvard University Library
P240-241