Answer: Polytheism is the worship of or belief in multiple deities . Which are usually assembled into a pantheon of gods and goddesses, along with their own religions and rituals . Many ancient civilizations believed in polytheism and worshipped numerous gods. In Christianity, polytheism does not exist because the religion acknowledges only one god . Polytheism characterizes virtually all religions other than Judaism, Christianity, and Islam, which share a common tradition of monotheism, the belief in one God.