Decrees, Papal Bulls
Decree against communism - Pope Pio XIIExcommunicates whoever collaborates anyway with communists
Oath against Modernism - Pope S. Pio XS. Pius X elaborated the famous anti-modernism oath, to be professed by all members of the clergy, pastors, confessors, preachers, religious superiors and seminary teachers of philosophy and theology.
Papal Oath - Pope S. AgatoOath taken by all Popes on the coronation day. Impressive document which reveals how the Pope must keep and guard the faith. It declares anathema who would dare to undertake anything new in contradiction to this constituted evangelic Tradition or to the integrity of Faith and Religion, or would seek to change anything concerning the integrity of our Faith.
Bull Unam Sanctam - Pope Bonifacius VIIIIn our days, where ecumenism is the order of the day in all sectors of society, it is necessary to remind some teachings of the Church, such as this Bull from Pope Boniface VIII, of 1302, where it is established that there is no salvation outside the Church.