The symbols in Kozuki's crest, the pseudo-Christian cross in Kuma's church and other symbols (Like signs or tattoos in Shandia, Alabasta, and Fishman Island) have one spot encircled by 8 small spots. Could this be the Earth and the 8 no-more-existing(?) moons/planets, that we can see in the Ohara library's 3d model?
Are there theories about this? (Probably yes lol :)).