At the Trumpet of God.

"We want you to be quite certain, brothers, about those who have died, to make sure that you do not grieve about them, like the other people who have no hope. We believe that Jesus died and rose again, and that it will be the same for those who have died in Jesus: God will bring them with him. We can tell you this from the Lord’s own teaching, that any of us who are left alive until the Lord’s coming will not have any advantage over those who have died. At the trumpet of God, the voice of the archangel will call out the command and the Lord himself will come down from heaven; those who have died in Christ will be the first to rise, and then those of us who are still alive will be taken up in the clouds, together with them; to meet the Lord in the air. So we shall stay with the Lord for ever. With such thoughts as these you should comfort one another." - 1 Thess. 4:13-18, which is today's 1st reading at Mass. Stone carved detail from the entrance to the Upper Chapel at the Sainte Chapelle in Paris.

Source: Lawrence OP on Flickr