The collection "Letters" by Julie Bondeli, who lived from 1732 to 1778, offers a unique insight into the life and thoughts of one of the most remarkable women of the 18th century. Julie Bondeli was a highly educated woman from Bern, who played a central role in various salons and intellectual circles. Her extensive correspondence with significant scholars of her time, including philosophers and writers, reflects the diversity of her interests. The letters cover topics in literature, philosophy, natural sciences, economics, as well as socio-political and medical issues. This edition brings together for the first time all known letters of Bondeli and complements them with a philosophical essay that deepens the understanding of her worldview. The letters are not only a document of her time but also a valuable contribution to the history of women's literature and the intellectual discourses of the 18th century.