The spires on old world buildings were energy harvesting devices, which were used to gather free energy from the aether. My guess is that ball that's under the cross probably contained mercury or some other substance that assisted in the production of energy.
All the old buildings had spires on the rooftops. The vast majority had been removed by the DS to cover up their purpose. The cathedral windows and organs were also used for energy & healing. Research cymatics -- the effect of energy frequency and vibration on water. Very interesting. And when we consider how much water is in the human body.....