One of the most important documents of the Conciliar era. More properly called A Brief Critical Study of the New Order of Mass, Archbishop Lefebvre commissioned 12 Roman theologians to undertake this in-depth analysis of the New Mass. It contends that the New Mass teems with dangerous errors in doctrine and represents an attack against the Catholic teaching on the Mass defined by the Council of Trent.

Not meant to be an exhaustive treatment, it was intended to point out those deviations from Catholic doctrine and practice which are most typical of the New Mass. In their oft-quoted letter of preface to Pope Paul VI, Cardinals Ottaviani and Bacci conclude: "...the Novus Ordo Missae...represents, both as a whole and in its details, a striking departure from the Catholic theology of the Mass as it was formulated in Session 22 of the Council of Trent..."

63pp. Softcover.