A Half Secret Pact
Speaking about the liberty at Vatican II to deal with diverse topics, Prof. Romano Amerio revealed some previously unpublished facts. “The salient and half-secret point that should be noted,” he stated, "is the restriction on the Council’s liberty to which John XXIII had agreed a few months earlier, in making an accord with the Orthodox Church by which the patriarchate of Moscow accepted the papal invitation to send observers to the Council, while the Pope for his part guaranteed the Council would refrain from condemning Communism. The negotiations took place at Metz in August 1962, and all the details of time and place were given at a press conference by Msgr. Schmitt, the Bishop of that Diocese [newspaper Le Lorrain, 2/9/63]. The negotiations ended in an agreement signed by metropolitan Nikodim for the Orthodox Church and Cardinal Tisserant, the Dean of the Sacred College of Cardinals, for the Holy See.
"News of the agreement was given in the France nouvelle, the central bulletin of the French Communist Party in the edition of January 16-22, 1963, in these terms: ‘Because the world socialist system is showing its superiority in an incontestable fashion, and is strong through the support of hundreds and hundreds of millions of men, the Church can no longer be content with a crude anti-Communism. As part of its dialogue with the Russian Orthodox Church, it has even promised there will be no direct attack on the Communist system at the Council.’ On the Catholic side, the daily La Croix of February 15, 1963, gave notice of the agreement, concluding: "As a consequence of this conversation, Msgr. Nikodim agreed that someone should go to Moscow carrying an invitation, on condition that guarantees were given concerning the apolitical attitude of the Council.’
“Moscow’s condition, namely that the Council should say nothing about Communism, was not, therefore, a secret, but the isolated publication of it made no impression on general opinion, as it was not taken up by the press at large and circulated, either because of the apathetic and anaesthetized attitude to Communism common in clerical circles or because the Pope took action to impose silence in the matter. Nonetheless, the agreement had a powerful, albeit silent, effect on the course of the Council when requests for a renewal of the condemnation of Communism were rejected in order to observe this agreement to say nothing about it.” 
Thus the Council, which made statements on capitalism and colonialism, said nothing specific about the greatest evil of the age, Communism. While the Vatican Monsignors were smiling at the Russian Schismatic representatives, many bishops were in prison and innumerable Faithful were either persecuted or driven underground for their fidelity to the Holy Roman Catholic Church.
The Kremlin/Vatican Negotiations
This important information about Vatican-Kremlin negotiations is confirmed in an article ‘The Mystery of the Rome-Moscow Pact’ published in the October, 1989 issue of 30 Dias, which quotes statements made by the Bishop of Metz, Paul Joseph Schmitt. In a February 9, 1963, interview with the newspaper Republican Lorrain, Msgr. Schmitt said:
“It was in our region that the ‘secret’ meeting of Cardinal Tisserant with Archbishop Nikodim occurred. The exact place was the residence of Fr. Lagarde, chaplain for the Little Sisters of the Poor in Borny [on the outskirts of Metz]. Here for the first time the arrival of the prelates of the Russian Church was mentioned. After this meeting, the conditions for the presence of the Russian church’s observers were established by Cardinal Willebrands, an assistant of Cardinal Bea. Archbishop Nikodim agreed that an official invitation should be sent to Moscow, with the guarantee of the apolitical character of the Council.” 
The same source also transcribed a letter of Bishop Georges Roche regarding the Pact of Metz:
“That accord was negotiated between the Kremlin and the Vatican at the highest level . . . But I can assure you . . . that the decision to invite Russian Orthodox observers to Vatican Council II was made personally by His Holiness John XXIII with the encouragement of Cardinal Montini, who was counselor to the Patriarch of Venice when he was Archbishop of Milan . . . Cardinal Tisserant received formal orders to negotiate the accord and to make sure that it would be observed during the Council.”