Early in the Pax Romana, a new religion, Christianity, arose in a distant corner of the Roman empire. At first, Christianity was one of many religions practiced in the empire. But the new faith grew rapidly, and by A.D. 395 it had been declared the official religion of the Roman empire.
The Church of the Holy Sepulchre in Jerusalem is the burial site of Jesus. Christians continue to make pilgrimages to the church.
As it gained strength and spread through the empire, Christianity reshaped Roman beliefs. When the Roman empire fell, the Christian Church took over much of its role, becoming the central institution of Western civilization for nearly 1,000 years.
Within the vast Roman empire, numerous religious beliefs thrived. Generally, Rome tolerated these varied religious traditions. As long as citizens showed loyalty by honoring Roman gods such as Jupiter and Mars and by accepting the divinity of the emperor, they were allowed to worship as they pleased. Since most people were polytheistic, they were content to worship the Roman gods alongside their own.
As Rome expanded, people came into contact with different religious traditions, including those in Egypt and the Fertile Crescent. During turbulent times, a growing number of people turned to the so-called mystery religions, which emphasized secret rituals and promised special rewards to believers. Among the most popular of these was the cult of Isis, which originated in Egypt and offered women equal status with men. Roman soldiers favored the cult of the Persian god Mithras, who championed good over evil and offered life after death.