"Isabelle of France (1225-1270) is best known as the sister of St. Louis and the founder of the female Franciscan community of Longchamp near Paris. In 1259 Pope Alexander IV approved the important new rule for this community, which Isabelle had co-authored with a team of leading Franciscan theologians, including St. Bonaventure. This was only the second female-authored rule after Clare of Assisi's 1253 Form of Life ever to be approved by the papacy. Moreover, in 1263 Isabelle secured a revision of her rule from Pope Urban IV, which granted her controversial desire to have her sisters be known as Sorores minores, analogous to the male Fratres minores. In this form, the Isabelline rule was adopted by numerous houses, particularly in France and England. In The Rules of Isabelle of France, Sean L. Field offers the first published English translations of both versions, along with a close study of their origins and interest for Franciscan history. The volume also illuminates the larger context around Isabelle of France and Longchamp by including translations (by Larry F. Field) of five papal letters to or concerning Isabelle."--Back cover.