Adrian IV and the grant of Ireland to England.—Ireland brought within the jurisdiction of Rome in the twelfth century.—Enlargement of the papal power.—Secular power administered by commission from the Pope.—Gregory VII and Innocent III.—The Fourth Lateran Council establishes the faith that institutions prejudicial to the Church should not be observed.—Papal doctrine in regard to oaths. Urban VI, Eugenius IV, and Innocent III.—Nature of the oath exacted by Innocent III from King John.—Subjects all governments to the Pope.—Effect in the United States.—Constitutional oath of allegiance.—Its obligation.—The papal theory on that subject.—Oaths opposed to the welfare of the Church not binding.—Unlawful oaths not binding.—What are lawful, and what are unlawful.—The papal principle applied to the government of the United States.—The papal argument by Balmes. Resistance to civil power usurped.—When it is usurped.—When legal, and when illegal.—Governments de jure and de facto.—Obedience to the last not obligatory.—May be recognized from prudential motives.—Government of the United States is de facto.—The monarchies of Europe, when obedient to the Pope, are de jure.—The doctrine of consummated facts denied.—Illegitimate authority cannot become legitimate by time.—Rendering to Caesar the things that are Caesar’s only requires obedience to legitimate governments.—Legitimate governments are only such as are based on the law of God.—That of the United States is not legitimate.