Religious tolerance, respectively, and intolerance in Rome usually exami-ned in relation to the treatment of Christians in the early fourth century. However, it has much deeper roots and goes through periods of intole-rance when they threatened the foundations of Roman morality and statehood and eligibility when cults fit in the traditional Roman concept of religion. Understanding the relationship of the Romans to foreign cults should always be tied to the position of the government on religious matters.
The Senate is empowered to decide on the inclusion of new families with their cults and rites to the Roman municipality. Later that power passes to a more general assessment of the eligibility of foreign cults practiced not only by foreigners in Rome, but also attract Roman citizens.
The study considers the main foreign cults in Rome – Judaism, Egyptian deities, Mithraic Mysteries, Christianity – and legal measures for religious tolerance. Christianity for three centuries passed from misunderstanding and denial to acceptance and tolerance favoritism by the government.