Maria Teresa Agnesi married Pier Antonio Pinottini on June 13, 1752, a union that allowed her to continue her musical career under her married name.
On June 13, 1752, Maria Teresa Agnesi married Pier Antonio Pinottini, a Milanese nobleman. Following the marriage, she frequently appears in historical records and on published scores under the combined name Agnesi Pinottini, reflecting the common practice of the period in which a woman's professional identity merged with her married name.
Unlike many women of her era, marriage did not end Maria Teresa's public artistic career. She continued to compose, perform, and receive patronage from the aristocracy and even foreign courts after her wedding, a notable exception to the era's expectation that married noblewomen withdraw from public artistic life. Her continued productivity as a composer of operas and keyboard works throughout the 1750s and beyond demonstrates the relative independence she maintained within her marriage.
The marriage is well documented in biographical dictionaries and encyclopedic sources on Agnesi, and it marks an important biographical anchor point distinguishing her personal life from that of her more famous sister, the mathematician Maria Gaetana Agnesi, who never married and instead pursued a religious and scholarly life. Maria Teresa's marital status and continued career illustrate the varied paths available to educated women of means in Enlightenment-era Milan.