Did not Philip III. and Philip IV. ask the Popes Paul V., Gregory V., and Alexander VII. to define the Immaculate Conception in order to stop the wrangling, the Popes replying that the doctrine was not definable as not being in Scripture?

The Popes have never given such a decision. Paul V. in 1617 forbade anyone to teach publicly that Mary was not immaculate. Gregory V. in 1622 ordered the discussion to stop until the Church should have given an official decision. Alexander VII. said that the Immaculate Conception of Mary was the common doctrine of the Church and that no one must deny it. None of these Popes gave a dogmatic definition, but rather a disciplinary ruling. Pope Pius IX. defined the doctrine finally in 1854.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty