Documenta Catholica Omnia is the official web site of the Cooperatorum Veritatis Societas, which publishes full text official versions of each written document belonging to the Roman Catholic and Apostolic Church, in their original languages as well as in faithful translations. A Latere of the catholic documents are shown the secular or adverse authors' texts quoted in the Catholic documents, whose knowledge is of paramount importance for the comprehension of the religious, cultural, economic and social context in which these documents must be inserted.