Simonetta Vespucci’s Death Recast as a Medical Mystery in Botticelli’s Orbit
A new study is reopening one of the Renaissance’s most persistent biographical gaps: how Simonetta Vespucci died. Researchers from the U.S. the U.K. and Italy argue in the latest issue of Endocrinology, Diabetes & Metabolism that the model associated with Sandro Botticelli’s *The Birth of Venus* may have died not of tuberculosis, as long assumed, but from a pituitary tumor.
The paper builds on earlier work led by Paolo Pozzilli of Queen Mary University of London, who, with two Italian collaborators, previously argued that Vespucci had a functioning pituitary adenoma. In the new study, the team says the tumor was likely a prolactinoma, a benign growth that can produce prolactin, the hormone that triggers breast milk production after childbirth. Such tumors can also cause infertility and spontaneous lactation. The researchers point to the fact that Vespucci had no children in the eight years between her marriage and her death, and to a Botticelli painting said to depict her in which milk appears to stream from her breast.
“We believe that this — along with changes in facial traits — could show the real physical symptoms of a prolactin-growth hormone secreting adenoma,” Pozzilli said in press materials tied to the paper.
The study also used a facial recognition algorithm to analyze five portraits of Vespucci. According to the researchers, the results suggested that changes in her face over time were consistent with the effects of a pituitary adenoma, which can grow in the sinus area. They say that same condition may help explain the off-kilter gaze in *The Birth of Venus*, where Venus’s eyes appear to look in different directions — a feature that later became associated with Renaissance beauty ideals.
The paper goes further, arguing that Vespucci’s final illness may have involved pituitary tumor apoplexy, a sudden and dangerous event caused by bleeding into or rapid expansion of the tumor. Letters between Piero Vespucci and Lorenzo de’Medici, the authors say, describe Simonetta collapsing during a ball and then suffering headaches, hallucinations, vomiting, and high fever in a darkened room. Domiziana Nardelli of the Universita Campus Bio-Medico di Roma said those symptoms align with a rapidly expanding pituitary tumor.
The researchers also raise a darker possibility: that apoplexy may have been triggered after Alfonso II D’Aragona, Duke of Calabria, raped her. They cite Lorenzo Sardi’s late 15th-century poem *De Anima Peregrina*, which reportedly recounts the assault. The paper notes that a sudden change in blood pressure caused by severe distress could have precipitated the event.
For now, tuberculosis remains the traditional explanation. But the new study suggests that Vespucci’s life — and perhaps one of Botticelli’s most famous faces — may be more medically specific than art history has long allowed.
