1 Thessalonians 2:19
What -- Who
Crown -- Stephenos, the victory laurel. Even in the OT crowns and garlands were used as symbols of future reward , Isaiah 28:5, Isaiah 62:3, Isaiah 61:3.
His coming -- Paul would have joy when he saw the Thessalonian Christians in the presence of Christ at His coming (at the judgement or in heaven. This is a good answer to the question, "Will we know each other in heaven?" Paul indicates he would know, or recognize, them.)
Coming -- παρουσια, official royal visit, about 22 times in the N.T.
Some Various Comings of Christ
*1 Emmanuel, the incarnation - Matthew 1:23; John 1:14;John 6:38;Galatians 4:4
This was the coming of the Lord in the flesh, his birth at Bethlehem.
2 Pentecost, Matthew 16:28 (Mark 9:1) Mark 14:62, Matthew 26:64
In some significant way it could be said that Christ also came on Pentecost representatively when he sent his promise of the Holy Spirit.
3 To Paul at His Conversion __ Acts 26:16, Acts 22:7-9 ; 1 Corinthians 15:8
The Lord came to Paul so he could see him alive after his crucifixion and thus qualify him to be an apostle.
4 In Visions -- At Jerusalem, Acts 22:17-18 (after conversion);
At Corinth, Acts 18:9; again at Jerusalem, Acts 23:11
5 AD 70, His coming in judgment upon the Jews for their rejection.
Matthew 24:27, Matthew 24:30, Matthew 24:44, Matthew 24:39; Mark 13:26-30; Luke 21:20-27; Hebrews 10:37; James 5:8
6 The Second Coming at the Resurrection -- 1 Thessalonians 1:1-18.