Amphitheatrum Sapientiae Aeternae is an alchemical classic, combining equally Christianity and magic. His most well known operate on alchemy is the Amphitheatrum Sapientiae Aeternae (Amphitheater of Eternal Wisdom), a operate on the mystical facets of that art, which incorporates the oft-observed engraving entitled "The First Stage of the Great Work", better-recognised as the "Alchemist's Laboratory".