0 ENCYCLICAL OF POPE PIUS XI ON THE PERSECUTION OF THE CHURCH IN MEXICO TO THE VENERABLE BRETHREN, THE PATRIARCHS, PRIMATES, ARCHBISHOPS, BISHOPS, AND OTHER ORDINARIES IN PEACE AND COMMUNION WITH THE APOSTOLIC SEE. In speaking to the Sacred College of Cardinals at the Consistory of last December, We pointed out that there existed no hope or possibility of relief from the sad and unjust conditions under which the Catholic religion exists today in Mexico except it be by a "special act of Divine Mercy." You, Venerable Brothers, did not delay to make your own and approve Our convictions and Our wishes in this regard, made known to you on so many occasions, for by every means within your power you urged all the faithful committed to your pastoral care to implore by instant prayers the Divine Founder of the Church that He bring some relief from the heavy burden of these great evils.
Source: Iniquis Afflictisque (Vatican.va)