29 We could not refrain from adding Our voice to this unanimous chorus of praise. We did so particularly in Our Encyclical Fulgens corona, by recalling, in the spirit of Our Predecessors, that "the Blessed Virgin Mary herself wanted to confirm by some special sign the definition which the Vicar on earth of her Divine Son had pronounced amidst the vigorous approbation of the whole Church."
Source: Le Pelerinage de Lourdes (Vatican.va)