In Cities of Ladies, the first history of the beguines available in English in almost fifty years, Walter Simons traces the transformation of informal clusters of single women to large beguinages. These veritable single-sex cities offered lower and middle class women an alternative to both marriage and convent life. While the region's expanding urban economies initially valued the communities for their cheap labor supply, severe economic crises by the fourteenth century restricted women's opportunities for work. Church authorities had also grown less tolerant of religious experimentation, hailing as subversive some aspects of beguine mysticism. To Simons, however, such accusations of heresy against the beguines were largely generated from a profound anxiety about their intellectual ambitions and their claims to a chaste life outside the cloister. Under ecclesiastical and economic pressure, beguine communities dwindled in size and influence, surviving only by adopting a posture of restraint and submission to church authorities.

Based on the archival records left by about 300 beguine communities, Cities of Ladies illuminates the context of beguine writings, which are considered among the most significant documents of medieval women's mysticism. In updating and expanding our knowledge of the beguines, Simons makes a significant contribution to the history of urbanization, religious change, and gender in medieval Europe.