The Adena were not very religious. Later as their culture grew they started to worship the sun. But that's about it.

Cats and dogs.

Adena Culture

Adena Culture

Adena were there first (800 B.C. - 200 A.D.). The Hopewell culture came later but overlapped with the Adena (200 B.C. - 400/500 A.D.). Most theories hold that the two intermixed peacefully, and the Hopewell culture was an elaboration and extension of the Adena mound-building culture. Thus the Hopewell art, burial ceremonies, etc were more flamboyant than that of the earlier and more primitive Adena.