Simonetta Vespucci, widely regarded as the face of the Italian Renaissance and the primary muse for Sandro Botticelli, may have died at the age of 23 due to complications from a tumour rather than tuberculosis. This finding emerges from a recent study conducted by an international team of scholars from Queen Mary University of London, the Campus Bio-Medico University of Rome, and the University of California, which challenges the historical consensus that the woman died of the common and deadly disease in 1476.
The researchers utilized a facial-recognition algorithm to examine portraits of Vespucci across several works, including Botticelli’s iconic "Birth of Venus." By analyzing changes in her features over time and reviewing contemporary documents, the team identified a gradual shift in her somatic appearance. Endocrinologist Paolo Pozzilli, one of the study's authors, noted that these changes were consistent with a pituitary adenoma, a tumour located at the base of the brain that regulates hormone production. The study, published in the journal Endocrinology, Diabetes & Metabolism, suggests the presence of a tumour secreting both growth hormone and prolactin, which could account for facial contour changes and, in some instances, unexpected lactation as depicted in Botticelli’s art.
According to the researchers, the adenoma likely grew over several years, eventually becoming a large mass that triggered a sudden death caused by pituitary tumour apoplexy. Pozzilli explained that this condition occurs when a tumour bleeds or swells suddenly, leading to severe headaches, confusion, vision loss, and a rapid decline in hormonal regulation. This hypothesis is supported by three distinct strands of evidence. First, the physical changes observed in paintings from the 1470s—such as variations in the jaw, forehead, and facial tissues—suggest the tumour’s progressive growth. Second, historical accounts of her illness describe symptoms like hallucinations, vomiting, fever, and headaches, which align more closely with apoplexy than the slower decline typical of tuberculosis.
Finally, two documented events in the months preceding her death provide further context. Letters between Piero Vespucci and Lorenzo de’ Medici describe her collapsing during a dance, and there is testimony regarding an alleged assault by Alfonso II of Aragon, Duke of Calabria. The authors suggest that either of these incidents could have plausibly triggered a haemorrhage or a sudden expansion of the tumour. While absolute certainty remains impossible, this diagnostic theory offers a new perspective on historical events and demonstrates how modern medical knowledge can reshape long-established beliefs about the lives of Renaissance figures.
This unprecedented diagnostic hypothesis, made at a distance of 550 years, is backed by three strands of evidence.
Nothing can be established with absolute certainty, but the rapid and sudden death of the young woman, previously in good health, points to a new diagnosis that reshapes long-established historical beliefs and could open the way to reinterpreting numerous historical events through the lens of modern medical knowledge.
