In this historical study, Lara Medina examines the early development and continuing influence of Las Hermanas, a feminist organization established in 1971 to counter the patriarchy and Eurocentrism of the U.S. Catholic Church. Lara Medina weaves archival research and oral interviews into a cohesive narrative that highlights the keen ethnic and political awareness among the movement's leaders and participants. Medina also illuminates the strides made by Las Hermanas in undermining and reorienting the male-dominated structure of both the Catholic ministry and the Chicano civil rights movement. By showing how the group has engaged such issues as moral authority, sexuality, and domestic abuse through its religiously informed efforts in grassroots community organizing and education, Lara Medina showcases the crucial role played by Las Hermanas in the articulation of a spiritually and politically grounded Latina/Chicana identity.Lara Medina is Associate Professor, Department of Chicano and Chicana Studies, California State University, Northridge.