In this book, the respected reader first gets acquainted with the works of outstanding masters of Hermetic Philosophy. Without exaggeration, all four authors of the presented collection are pillars of Hermetic Philosophy - Alchemy: Arab Artefius (? -1128), who lived more than the Methuselahs of the century: the Englishman Hortulan (? - 1040?) with his comments on the Emerald Tablet of Hermes Trismegistus; the revered Spaniard Arnold de Villanova (1235 or 1240-1311), in turn commenting on Hortulan and, finally, the unforgettable Philosopher, German, Bernhard Count of Trevisan (1406-1490).