Caterina Sforza From Cannons to Chemistry

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In this episode of pplpod, we explore the life of Caterina Sforza, the Renaissance noblewoman remembered as "the Tiger of Forlì," whose reputation for brutality overshadows her skill as a military tactician and her work as a pioneering experimental scientist. Born in 1463 as the illegitimate daughter of Galeazzo Maria Sforza, later Duke of Milan, she was raised at the ducal court and adopted by his wife, Bona of Savoy. She received a rigorous humanist education, reading military history in Latin, learning martial skills from her grandmother Bianca Maria Visconti, and studying botanical medicine through the court apothecary. Betrothed at 10 to Girolamo Riario, nephew of Pope Sixtus IV, she moved to Rome at 14 and became a skilled political intermediary.

The episode follows the 1484 papal interregnum, when the seven-months-pregnant Caterina seized Castel Sant'Angelo and threatened the conclave until Girolamo accepted 8,000 ducats and the family left for Forlì. After Girolamo's assassination by the Orsi in 1488, she held the fortress of Ravaldino and bluffed her captors with cold logic, a story Machiavelli later distorted into a lurid myth. She secretly married the commoner Giacomo Feo, and his murder in 1495 triggered a revenge massacre of 38 people along with wives and children, destroying her public support. In 1499 the citizens refused to defend Forlì against Cesare Borgia, and she was overrun at Ravaldino in early 1500, chained, and imprisoned in Castel Sant'Angelo until 1501. In Florentine exile she compiled Gli Experimenti, a manuscript of 454 recipes on medicine, cosmetics, and distillation, leaving a legacy of defiance, ambition, and scientific curiosity.

In this episode we cover...

• The 1484 seizure of Castel Sant'Angelo, the papal election standoff, and the myth of "the Tiger"
• Her Milanese upbringing as Galeazzo Maria Sforza's daughter, her humanist, martial, and botanical education, and her betrothal and move to Rome
• The 8,000 ducat deal, Girolamo's tax mismanagement, his 1488 assassination, the Ravaldino standoff, and Machiavelli's distorted account
• Her regency, her secret marriage to Giacomo Feo, his 1495 murder, the revenge massacre, and the loss of public loyalty
• Cesare Borgia's 1499 to 1500 campaign, the fall of Ravaldino, her imprisonment in Castel Sant'Angelo, exile in Florence, Gli Experimenti, and Antonia Fraser's comparison with Isabella of Castile

Source credit: Research for this episode included transcript materials and supporting Italian Renaissance, Sforza family, papal politics, military, alchemical, pharmacological, and biographical sources accessed October 31, 2026. Content is summarized and adapted for commentary and educational use.