When was heaven created?

When was heaven created?
When the earth was created.	Sometime after the ascension of Jesus.
Matthew 25:34 Then shall the King say unto them on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world.	John 14:2 In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.