The Lady of Secrets: How Isabella Cortese Made Science Go Viral in 1561
The historical Isabella Cortese is a ghost. No baptismal record, no notarial document, no grave. What she left behind is a book: I secreti della signora Isabella Cortese, published in Venice in 1561, containing roughly 300 recipes for medicine, alchemy, metallurgy, perfumery, and cosmetics. It went through at least fifteen Italian editions over 116 years, was translated into German, and earned its author a place among the 'professori di secreti,' the professional dealers in practical knowledge. Whether 'Isabella Cortese' was a real woman, a pseudonym, or a marketing strategy, her book did something no comparable text had done: it put a woman's name on the cover of a Renaissance bestselling laboratory manual.