La Croix de verre, précédé du Siège de Lyon by Grasset d'Orcet is a historical narrative exploring esoteric and symbolic interpretations of the 1793 Siege of Lyon during the French Revolution. Drawing on archival sources and mystical traditions, the author examines the political, spiritual, and architectural symbolism embedded in this pivotal event. The work blends historical analysis with speculative insight, reflecting Grasset d'Orcet’s reputation as a scholar fascinated by hidden meanings in history. Originally published in French, this edition presents a detailed account that appeals to readers interested in revolutionary France, hermeticism, and alternative historical perspectives.