Today is the 50th anniversary of the Short Critical Study of the New Order of Mass, better known as the “Ottaviani Intervention” after one of the two cardinals who signed it (Alfredo Ottaviani and Antonio Bacci). The study bears the date of Thursday, June 5, 1969, which was the feast of Corpus Christi that year.
The study was, however, not delivered to Pope Paul VI until almost four months later, with a cover letter dated September 25, 1969. In this letter the Cardinals aver:
The accompanying Critical Study is the work of a select group of bishops, theologians, liturgists, and pastors of souls. Despite its brevity, the study shows quite clearly that the Novus Ordo Missae -- considering the new elements widely susceptible to widely different interpretations which are implied or taken for granted -- 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. The "canons" of the rite definitively fixed at that time erected an insurmountable barrier against any heresy which might attack the integrity of the Mystery.