A refined stipple engraving by Ernesta Bisi depicting the mathematician Maria Gaetana Agnesi, rendered with delicate tonal precision.

This stipple engraving by Ernesta Bisi depicts the Italian mathematician and philosopher Maria Gaetana Agnesi. Agnesi, who lived from 1718 to 1799, is recognised for her work in differential and integral calculus, specifically her treatise 'Instituzioni analitiche ad uso della gioventù italiana'. Bisi, a skilled engraver and painter from Milan, captures the subject within a classic oval frame. The stipple technique, which uses small dots to create tonal variations rather than continuous lines, allows for a soft, painterly quality in the rendering of the skin and the texture of the fur trim on her garment. The composition is restrained, focusing entirely on the subject's likeness, which is typical of the portraiture conventions of the early nineteenth century. Maria Gaetana Agnesi is presented with a calm, intellectual gaze. The simplicity of the presentation reflects the Enlightenment values associated with her academic contributions. The print serves as a historical record of a woman who achieved significant recognition in the male-dominated scientific circles of the eighteenth century. Bisi's technical execution demonstrates the precision required for high-quality reproductive printmaking during this period, ensuring that the likeness remained accurate for distribution and scholarly reference. The print is a fine example of the intersection between scientific history and the graphic arts. It provides a clear, monochromatic study of the subject, suitable for those interested in the history of science or the development of European portrait engraving techniques.