What did Pilate’s wife dream about?

In Matthew 27, we read:

Matt. 27:17 So when the people gathered together, Pilate said to them, “Whom do you want me to release for you? Barabbas, or Jesus  who is called Christ?” 
Matt. 27:18 For he knew that because of envy they had handed Him over. 
Matt. 27:19  While he was sitting on the judgment seat, his wife sent him a message, saying, “Have nothing to do with that righteous Man; for  last night I suffered greatly in a dream because of Him.” 

Pilate's "wife" interrupted him as he sat "on the judgment seat," about to render a verdict in Jesus' case. Matthew probably recorded this incident because it is another indication of Jesus' innocence. Many of the Romans considered dreams a means of divine guidance. In this case, God did guide her to testify to Jesus’ righteousness.

Tradition has given her the name Procula. Some ancient writings claim she was a convert to Judaism while the Greek Orthodox Church has actually placed her in their "Catalog of Saints.”

We don’t know the content of the dream, but whatever she saw, it was a revelation that Jesus was not someone her husband should have judged.