WORLD HISTORY

Detailed explanation-1: -One of the many factors that contributed to the fall of the Roman Empire was the rise of a new religion, Christianity. The Christian religion, which was monotheistic ran counter to the traditional Roman religion, which was polytheistic (many gods).

Detailed explanation-2: -In 313 AD, the Emperor Constantine issued the Edict of Milan, which accepted Christianity: 10 years later, it had become the official religion of the Roman Empire.

Detailed explanation-3: -In 380 CE, the emperor Theodosius issued the Edict of Thessalonica, which made Christianity, specifically Nicene Christianity, the official religion of the Roman Empire.

Detailed explanation-4: -Christianity continued to spread through the territories of the western Roman Empire after its fall in 476. Over the next several centuries, it became the dominant religion in the city of Rome as well as the European regions over which the Roman Empire had ruled.

Detailed explanation-5: -Christianity became the official religion of the Roman Empire when Emperor Theodosius I issued the Edict of Thessalonica in 380, which recognized the catholic orthodoxy of Nicene Christians in the Great Church as the Roman Empire’s state religion.