From 1932 to 1937, he studied Letters and Philosophy at the Sorbonne University[1] where he knew Maxime Charles (whom Veuillot refused to defend in the 1958 dispute with cardinal Maurice Feltin for the Centre Richelieu, the Almshouse of Parish students) and Robert Frossard, his future auxiliary bishop.

In October 1942, he was appointed professor of philosophy at the infant seminary of Conflans[3] which was directed by the abbot Marc-Armand Lallier (1906–1988), the future bishop of Nancy.

In occasion of the golden wedding of his parents, he met the newly nominated nuncio Mgr Roncalli who gave him the opportunity to be received in Rome by the Pope Pius XII.

The previous year, Veuillot received the right to bear the title of Prelate of His Holiness, a right that elevated him to the episcopal dignity and gave him the capability to start the preparatory works of the encyclical Fidei donum, published in 1957 by Pius XII.

On 1 December 1966 he became Archbishop of Paris, and on 26 June of the following year Pope Paul VI made him Cardinal-Priest of San Luigi dei Francesi as well.