Le Pelerinage de Lourdes §32

³² But We would like especially to recall to your attention, Beloved Sons and Venerable Brothers, a recent document in which We encouraged the growth of a missionary apostolate in your beloved country. We intended by this message to call to mind the "singular merits which France had acquired through the centuries in the progress of the Catholic faith," and for this reason "We turned Our mind and heart to Lourdes where, four years after the definition of the dogma, the Immaculate Virgin herself gave supernatural confirmation to the declaration of the Supreme Teacher, by appearances, conversations, and miracles."