Sometimes you gotta shoot the “wrong thing”.
The only source of light into the Pantheon comes from the center (the oculus). Said oculus is a popular shot, tourists angling their lenses up to the ceiling to capture it and the surrounding dome walls, which are eye-catching swirls of squares. My traveling companion used it as a selfie backdrop — super clever. Me? I was drawn to the oddly shaped light reflected on the walls — which source was said oculus.
In retrospect, I kinda sorta took the “wrong” photo, but kinda sorta not.
Shot on iPhone 8. Also, see below for a bonus photo, with black and white filter.