July 15, in commemoration of the missionary work of the Twelve Apostles. It was first mentioned in the 11th century and was celebrated in the northern countries of Europe during the Middle Ages. It is now observed in Germany, Poland, and some dioceses of England and France, and in the United States in the ecclesiastical provinces of Saint Louis, Chicago, Milwaukee, Dubuque, and Santa Fe.
This dictionary contains not only definitions and explanations of every subject in Religion, Scripture, tradition, doctrine, morals, sacraments, rites, customs, devotions and symbolism, but also accounts of the Church in every continent, country, diocese; missions, notable Catholic centers, cities, and places with religious names; religious orders, church societies, sects and false religions. It has brief articles also on historical events and personages, on the Old Testament and New, and on popes, prelates, priests, men and women of distinction, showing what the Church has done for civilization and correcting many errors which have hitherto passed for history.Wikipedia
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