0 ENCYCLICAL OF POPE PIUS XI ON THE CHURCH AND THE GERMAN REICH TO THE VENERABLE BRETHREN THE ARCHBISHOPS AND BISHOPS OF GERMANY AND OTHER ORDINARIES IN PEACE AND COMMUNION WITH THE APOSTOLIC SEE. Venerable Brethren, Greetings, and Apostolic Blessing. It is with deep anxiety and growing surprise that We have long been following the painful trials of the Church and the increasing vexations which afflict those who have remained loyal in heart and action in the midst of a people that once received from St. Boniface the bright message and the Gospel of Christ and God's Kingdom.
Source: Mit Brennender Sorge (Vatican.va)