Much of Marie Dentière's early life remains unknown. She was born in Tournai into a relatively well-off family of the lesser nobility. She entered the Augustinian nunnery of Saint-Nicolas-dés-Prés in Tournai at a young age in 1508, eventually becoming abbess in 1521. Martin Luther's preaching against monasticism led her to flee to Strasbourg in 1524 to escape persecution — not only for abandoning her position as a nun, but for converting to the Reformation. Strasbourg was a popular refuge for Protestants at that time. While in Strasbourg, in 1528, she married Simon Robert, a young priest. Soon they left for an area outside of Geneva to preach the Reformation, and had five children together. Robert died 5 years later in 1533, and the now widowed Dentière married Antoine Froment, who was at work in Geneva with Farel. Dentière's outspokenness strongly irritated Farel and Calvin, which in turn drove a rift between them and Froment.
Religious accomplishments
Dentière's work stresses the importance of the Reformation, but also the need for a larger role for women in religious practice. To Dentière, women and men were equally qualified and entitled to the interpretation of Scripture and practice of religion. In Geneva in 1536, following the successful rebellion against the Duke of Savoy and the localprince-bishop, Dentière composed The War and Deliverance of the City of Geneva. The work was published anonymously, and called for Genevans to adopt the Reformation. In 1539, Dentière wrote an open letter to Marguerite of Navarre, sister of King Francis I of France. The letter, called the Epistre tres utile, or "very useful letter", called for an expulsion of Catholic clergy from France, advocated a greater role for women in the church, and criticized the foolishness of the Protestant clergy who compelled Calvin and Farel to leave Geneva. The letter was quickly suppressed due to its subversiveness. However her encouragement of women's involvement in writing and theology angered Genevan authorities. Upon publication, the Epistle was seized and most of the copies destroyed. Only approximately 400 copies of the letter survived and entered circulation. Following the publication and subsequent suppression of Dentière's work, the Genevan council prevented the publication of any other woman author in the city for the rest of the 16th century.