Ancient Roman religious practices mostly mimicked those of Ancient Greece. The Romans copied the Greek pantheon of gods but renamed them. For example, Zeus became Jupiter, Hera became Juno, Poseidon became Neptune, Aphrodite became Venus, and Athena became Diana. Later on, the Romans also began to incorporate the worship of various "eastern" deities, such as the Egyptian goddess Isis, as well as the Persian god Mithras.

Ultimately, Christianity was adopted as the official religion of Rome, supplanting all other religious practices.