The Writings of Maria Prophetissa, the Jewess present a contemporary and authorial reconstruction of the alchemical tradition associated with one of the founding figures of Western alchemy. Known in ancient sources as an operative authority rather than a speculative philosopher, Maria Prophetissa survives through fragments preserved by authors such as Zosimos of Panopolis, where she becomes a fundamental reference for the understanding of fire, the vessel, and the proper timing of the Work. This book does not attempt to restore a lost treatise or offer a purely academic study, but to reactivate a way of thinking and operating alchemy. Drawing exclusively from public-domain traditional principles, the work organizes fragments inspired by the ancient tradition into a continuous, clear, and symbolic discourse, expressed in a language accessible to the contemporary reader without diminishing the integrity of the Art. Throughout the book, the technical foundations attributed to the Marian tradition-such as the moderated fire, the sealed vessel, and the famous Bain-Marie-are presented alongside the central themes of classical alchemy: the union of opposites, necessary dissolution, and regeneration. Each stage is approached not only as a material process but also as the reflection of a deeper transformation, requiring attention, patience, and fidelity to the rhythms of nature.