The Resurrection of Christ.
The open grave:
Related Commentaries of Matthew 28:1
Matthew 28:1-3
1 In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulchre.
2 And, behold, there wasa a great earthquake: for the angel of the Lord descended from heaven, and came and rolled back the stone from the door, and sat upon it.
3 His countenance was like lightning, and his raiment white as snow: