This lecture by Ana Luiza Ferreira Gomes Silva is about the book ‘Shaping Canon Law in an Age of Reform: Petrus Peckius on Church Reparation and Clerical Discipline’. This book examines the contributions of Petrus Peckius (1529–1589), a law professor at the University of Leuven, focusing on how he shaped canon law during a period marked by the rise of Protestantism, political conflict, and the Catholic Reform movement, especially the Council of Trent (1545–1563). While Peckius largely adhered to established canons and the jurisprudence of the ius commune, he also engaged with reform, introduced methodological innovations, and adapted to contemporary challenges. Drawing on Peckius’ published works and student lecture notes from Leuven (1575–1577), the book offers insight into his role as both jurist and educator. The study centers on two key issues Peckius explored: (1) the reparation of churches damaged during the Iconoclastic Fury and (2) the regulation of clerical conduct.