I used a surreal style to portray Christianity. Light shining on the outside of the stained glass window reflects on the cathedral floor with the reflection showing Christ on the cross. This symbolizes His presence in the church even though he is not visible from the outside. Other symbols: the light coming down from the dove represents the Holy Spirit uniting with Jesus.
The supporting pillar which is both inside and outside the cathedral simultaneously represents the Catholic Church — the foundation on which Christianity was built.