On December 26, 1948, Cardinal Mindszenty, Archbishop of Ersztergom and Primate of Hungary, was arrested by the Communist government of that nation. It was the beginning of a slow via crucis which would last until his last days. Pope Pius XII, who had named him Archbishop and created him Cardinal right after the war, condemned the action a few days later through his Letter Acerrimo Moerore ("To the Bishops of Hungary", January 2, 1949 - in Italian).
For a contemporary account of the Mindszenty affair: Time magazine archives.
