See this legally free ebook:
- Mysterium Ecclesiae: Declaration in Defense of the Catholic Doctrine on the Church Against Certain Errors of the Present Day, by the Sacred Congregation for the Doctrine of the Faith, June 24, 1973. May be read online at St. Michael’s Cyberspace Scriptorium and Library and the Holy See.
On the Memorial of Pope St. Gregory the Great in the Ordinary Form of the Roman Rite, and the Feast of Pope St. Pius X in the Extraordinary Form of the Roman Rite. For other legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject). Blessed be God in His angels and in His saints!