On the Church: Historical-Dogmatic Treatises - Volume II - Hermann Dieckmann

On the Church: Historical-Dogmatic Treatises, Volume II by Hermann Dieckmann is a scholastic treatise in ecclesiology that examines the nature, properties, and authority of the Church. Building upon the foundations established in the first volume, it develops a systematic account of the Church's constitution, mission, and role in salvation history.

A central concern of the volume is the Church's essential marks and governing authority. Dieckmann analyzes the traditional notes of the Church—one, holy, catholic, and apostolic—and provides an extensive defense of Petrine primacy and the authority of the Roman Pontiff as principles of ecclesial unity.

The work also examines the Church's relationship to Christ, the Holy Trinity, and civil society, while engaging important magisterial teachings on ecclesiastical authority. Overall, it presents a comprehensive dogmatic exposition of the Catholic doctrine of the Church and her divinely established structure.