The Catholic Dogma: Extra Ecclesiam Nullus Omnino Salvatur is a polemical work by Michael Muller, prolific Catholic priest and author. It consist, to a large extent, of lengthy quotes from such authorities of old ages as Pius IX, St Bellarmine, St Augustine, St Alphonsus Liguori, St Thomas Aquinas, and also from some authorities of modern days. The book proposes the strict interpretation of the dogma in accordance with Scripture and the Magisterium and it explains the perennial truths of the Catholic faith regarding no salvation outside the Church.

Michael Müller (1825-1899) was a prolific Catholic writer of the 19th century in the United States. He wrote on the concept of invincible or inculpable ignorance. His best known works are The Catholic Dogma, God the Teacher of Mankind, and Golden Rules for Directing Religious Communities, Seminaries, Colleges, Schools, Families, Etc.