Vaticano - Catecismo da Igreja CatólicaItem 1001. When? Definitely on the last day» (Jn 6:39-40, 44, 54; 11:24), «at the end of the world» (578). Indeed, the resurrection of the dead is closely associated with the Parousia of Christ: «At a signal, with the voice of the archangel and with the trumpet call of God, the Lord himself will descend from heaven, and the dead in Christ will rise first» (1 Thess 4:16).
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