Ecclesiology

Defines the dogma of papal primacy of jurisdiction over the universal Church and papal infallibility when the Pope speaks ex cathedra on matters of faith and morals.

Identifies and condemns Modernism as a systematic heresy that reduces dogma to evolving human experience, undermining the foundations of Catholic faith.

Defines the Church as the Mystical Body of Christ — a visible, hierarchical society animated by the Holy Spirit and governed by the Pope as Vicar of Christ.

Defines as dogma that the Blessed Virgin Mary, having completed the course of her earthly life, was assumed body and soul into heavenly glory — the most recent exercise of papal infallibility.

The dogmatic constitution on the Church — treating the Church as mystery, as People of God, the hierarchical constitution, the laity, the universal call to holiness, religious life, eschatology, and the Blessed Virgin Mary.

The dogmatic constitution on divine revelation — addressing the nature of revelation, the transmission of revelation through scripture and tradition, the inspiration and interpretation of scripture, and the role of scripture in the life of the Church.