378. When was heaven created?

When the earth was created.

In the beginning God created the heaven and the earth. Genesis 1:1

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. Matthew 25:34

Sometime after the ascension of Jesus.

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. John 14:2