I never would have imagined the Azeyma Sun symbol plastered all over the Cathedral to represent Sephiroth. I thought the Cathedral was built by them, but the symbols were later added by either the Allagans or Seeker Miqo'tes.

Interestingly, it seems as if the Allagans once worshipped Azeyma/ the Sun. I remember we had a discussion about this awhile back on who they once worshipped and many believed it was Azeyma (especially since Xande had a sun in his gear) and potentially even Menphina due to there being Allagan Sun/Moon highways. Worship of gods began to wane when resurrected Xande took control.

Then there's also them harnessing the power of the Sun (CT) and then sending Dalamud to the Moon