It explains matters from the point of view of the official Catholic doctrine , as it was during the time of Pope Pius X. It tells the accomplishments of Catholics and some others in nearly all intellectual and professional pursuits . These include artists , educators , poets and scientists . The encyclopedia was designed to serve the Roman Catholic Church , excluding information which has no relation to the Church and explaining matters from the point of view of the official Catholic doctrine , as it stood during the pontificate of Pius X. It records the accomplishments of Catholics and some others in nearly all intellectual and professional pursuits , including artists , educators , poets and scientists .