Uncover the life and influence of a key figure in medieval Irish Church history. This study delves into the life and work of Gille of Limerick (c.1070-1145), exploring his canonical writings and their impact on the 12th-century Irish Church. Gain insights into the historical context, ecclesiastical reforms, and theological underpinnings of Gille's vision. Discover a critical edition and English translation of Gille's primary works, including De usu ecclesiastico and De statu Ecclesiae. Explore his role as a papal legate, his relationship with Anselm of Canterbury, and his lasting contributions to canon law, monasticism, and the spiritual dimensions of medieval church reform. This insightful resource is ideal for professionals, scholars, and students of medieval history, Irish studies, and religious history.