Thanks JBB and John. Im glad I decided to bring that little LED light to see in the pool as I recall John saying he had struggled in the darkness to really see the pool. It was really special the pastor allowed close to 100 people to go down and see the pool. That is an important piece of history as is the rest of the building. I was interested to see many parts of the church appeared to be relatively unchanged inside. There were minor details even the feel and creaking of the sanctuary floor as people walked in that adds to the character. Im sure there have been changes over the years but generally speaking it felt very true to its original design. It appears at the center of the skylight there is an exhaust fan. That ties back to a comment the lead minister at 1st Christian made about their domed skylight have a pulley system to raise the center portion up allowing forced air to exhaust up through the building and out the cupola (pre-air conditioning).
It appears that the skylight is no longer exposed to natural light. Was this always the case or did they cover it with a more traditional roof at some point?