Mandaeism is a religious movement that emerged in the first century A.D. in the Mesopotamian region. Mandaeans are followers of this faith that revolves around an elaborate baptismal ritual, worship of John the Baptist, and an emphasis on morality. There are a few synonyms that are sometimes used to describe this faith, including Mandaeanism, Sabianism, and Nasoreanism. Sabianism, in particular, is often used to refer to the Mandaeans because their faith shares some similarities with the ancient pre-Islamic Sabian religion. Additionally, Nasoreanism is also used to describe the faith because of its connection to the Nasorean sect of Gnosticism.