Answer :
The Roman and Greek civilizations had the most similar religious beliefs, with the Romans adopting and equating Greek deities to their own after conquering Greece in 146 BC.
The ancient civilizations that had the most similar religious beliefs were the Roman and Greek civilizations. When the Roman Empire conquered Greece in 146 BC, it adopted much of Greek religion and culture, incorporating these aspects into its own. The Greek gods were equated with Roman deities, demonstrating a near-identical pantheon: Zeus with Jupiter, Aphrodite with Venus, and so on. This syncretism facilitated a shared pantheon between the two civilizations, reflecting a high degree of similarity in religious beliefs. In contrast, the Persian religion of Zoroastrianism, Chinese religious thoughts, and Norse religion differed significantly from both Greek and Roman beliefs.
