The Eastern Roman Empire is also known as the Byzantine Empire. After the demise of the Western Roman Empire, the Roman regime that continued in the eastern part of the empire was called the Eastern Roman Empire, and some people called it the Byzantine Empire. Eastern Roman countries are located in eastern Europe. Its territory once included Europe, Asia and Africa, western Asia and northern Africa. It is the oldest monarchy in ancient and medieval Europe.

Causes and enlightenment of the demise of Byzantine Empire;

1, extinction reason:

(1) The national treasury is empty and the people are poor. The country is unable to maintain a huge military force to rule a vast area, and its territory is constantly being eroded by foreigners.

(2) The internal and external troubles of the empire are declining.

(3)/kloc-In the first half of the 3rd century, the western army marched eastward and conquered and ruled Byzantium for more than half a century. The empire's territory was greatly reduced, divided, its national strength declined and its political power was in jeopardy.

(4)/Kloc-At the end of 0/3, Ottoman Turkey infiltrated the Balkans. /kloc-in the middle of the 0/5th century, Constantinople was captured by the Turkish army, and the Byzantine Empire, which lasted for more than 1000 years, finally perished.

2. Enlightenment:

Openness and tolerance make civilization prosper, while conservatism and narrowness make civilization decline. Civilization has no national boundaries, only backwardness and advancement. Only by keeping an open attitude and actively learning advanced civilization can we stand tall among nations.