The mysterious disciple of the even more mysterious Master Fulcanelli shows how Western European arts (and not only traditional ones), folk customs and even the Catholic Mass are permeated with alchemical symbolism. A number of works from different years are devoted to the interpretation of these symbols in the key of Hermetic philosophy, as well as sacred linguistics, united by the author into this book, which will be of interest not only to “mystics and gnostics,” but also to art historians, philologists and religious scholars. And the curly style of past centuries, coupled with beautiful reproductions of alchemical engravings and miniatures, will not leave anyone indifferent. The text of the book was translated from the original language using an artificial intelligence program. For the most part, the translation of the text is of very high quality, but in some cases, due to the imperfection of the technology, there may be incorrect phrase translations in the text, as well as single words and expressions may not be translated.