Marie Anne Pierrette Paulze was born in 1758 to a wealthy French family and married twenty-eight-year-old Antoine Laurent Lavoisier when she was just over thirteen. Although it was a marriage of convenience, the bond developed into a loving and collaborative relationship. It is unclear what Marie Anne had studied before her marriage, but it is known that she began to develop an interest in chemistry very early on and actively worked in her husband’s laboratory. She received chemistry lessons from some of Lavoisier’s colleagues, and most of the research conducted in the laboratory was a joint effort between her and her husband. With her, Lavoisier continued his studies on combustion, and thanks to her, and her translation of the works of the Englishmen Black, Cavendish, and Priestley, he was able to keep abreast of current chemical studies and carry out a plan of experiments that revolutionized the study of air and gases in general and led to the discovery of oxygen¹. Paulze accompanied Lavoisier in his laboratory, keeping rigorous records of the procedures followed during the experiments and drawing diagrams of his experimental designs. The training she had received from the painter Jacques-Louis David enabled her to precisely draw the experimental apparatuses that allowed many of Lavoisier’s contemporaries to understand his methods and results. Furthermore, Paulze edited his reports and contributed to the publication, in 1789, of Lavoisier’s Elementary Treatise of Chemistry, which proved revolutionary for chemistry in the year of the French Revolution, as it introduced the idea of ​​conservation of mass, a list of elements, and a new system for chemical nomenclature. Later, in 1820, she edited and published Lavoisier’s Memoirs. As with the more famous couple Pierre and Marie Curie, the advancement in chemistry cannot be attributed to one or the other, but it is safe to assume that much of the work credited to Lavoisier bears Marie Anne’s contributions. However, compared to the Curies, the time was not ripe for a woman to be recognized for scientific achievements. On the other hand, Paulze was a great admirer of her husband and, even after his tragic death², she continued to disseminate his works and recover the notes and laboratory instruments that had been confiscated from him. Many of these are still preserved at Cornell University in New York State.