members of the Polish clergy (18%) were killed in concentration camps. In the city of Chełmno, for example, 48% of the Catholic clergy were killed. Catholicism continued to be persecuted under the Communist regime from the 1950s. Contemporary Stalinist ideology claimed that the Church and religion in general were about to disintegrate. Initially, Archbishop Wyszyński entered into an agreement with the Communist authorities, which was signed on 14 February 1950 by the Polish episcopate and the government. The Agreement regulated the matters of the Church in Poland. However, in May of that year, the Sejm breached the Agreement by passing a law for the confiscation of Church property. On 12 January 1953, Wyszyński was elevated to the rank of cardinal by Pius XII as another wave of persecution began in Poland. When the bishops voiced their opposition to state interference in ecclesiastical appointments, mass trials and the internment of priests beganthe cardinal being one of its victims. On 25 September 1953 he was imprisoned at Grudziądz, and later placed under house arrest in monasteries in Prudnik near Opole and in Komańcza Monastery in the Bieszczady Mountains. He was released on 26 October 1956. Pope John Paul II, who was born in Poland as Karol Wojtyla, often cited the persecution of Polish Catholics in his stance against Communism. Spain Anti-clericalism in Spain at the start of the Spanish Civil War resulted in the killing of almost 7,000 clergy, the destruction of hundreds of churches and the persecution of lay people in Spain's Red Terror. Hundreds of Martyrs of the Spanish Civil War have been beatified and hundreds more in October 2007. In mixed Catholic-Protestant countries Switzerland The Jesuits (Societas Jesu) were banned from all activities in either clerical or pedagogical functions by Article 51 of the Swiss constitution in 1848. The reason for the ban was the perceived threat to the stability of the state resulting from Jesuit advocacy of traditional Catholicism; it followed the Roman Catholic cantons forming an unconstitutional separate alliance leading to civil war. In June 1973, 55% of Swiss voters approved removing the ban on the Jesuits (as well as Article 52 which banned monasteries and convents from Switzerland). (See Kulturkampf and Religion in Switzerland) In primarily Orthodox countries Byzantine Empire In the East–West Schism of 1054 the Eastern Orthodox Church and the Catholic Church broke their full communion with each other because of Ecclesiastical differences, Theological,