During the vacancy of the Apostolic See, and above all during the time of the election of the Successor of Peter, the Church is united in a very special way with her Pastors and particularly with the Cardinal electors of the Supreme Pontiff, and she asks God to grant her a new Pope as a gift of his goodness and providence.

Indeed, following the example of the first Christian community spoken of in the Acts of the Apostles (cf. 1:14), the universal Church, spiritually united with Mary, the Mother of Jesus, should persevere with one heart in prayer; thus the election of the new Pope will not be something unconnected with the People of God and concerning the College of electors alone, but will be in a certain sense an act of the whole Church.

I therefore lay down that in all cities and other places, at least the more important ones, as soon as news is received of the vacancy of the Apostolic See and, in particular, of the death of the Pope, and following the celebration of his solemn funeral rites, humble and persevering prayers are to be offered to the Lord (cf. Mt 21:22; Mk 11:24), that he may enlighten the electors and make them so like-minded in their task that a speedy, harmonious and fruitful election may take place, as the salvation of souls and the good of the whole People of God demand.

Pope John Paul II