Religion

God: In the world of One Piece it is unknown whatever such entity exists, yet there is many religious refrance scattered across the series. In Skypiea, this title refers to a ruling body of sky islands, instend of any kings or other form of government. This person however is not a real God but a physical being who is not all powerful and not perfect, the God acts a king. Smoking God was the oldest known God 400 years ago. Gun Fall was a God 6 years ago before Eneru took over. Eneru took this title seriously, believing to be an all-powerful God only to be beaten up by Luffy. After Eneru was gone, Gun Fall re-took the title.

Does God exist in One Piece?
Sanji made many referance of God, he once asked Zoro if he believes in God, Zoro did not answer because he don't believe in God. Again after defeating Jabura, Sanji metioned God.

However, Conis questions if whatever or not does God exist, she then shouts out Help us, God!!.

Bartholomew Kuma has a Bible in his hands and always carries it with him