What were the three most important contributions of the byzantine empire to world history?

Three important things from Byzantine challenges to world history are

1. The Romans adopted the civilization practices they conquered

The Romans adopted the religious structure and theatrical genre of the Greeks. The Roman adoption of several cultural practices that they conquered showed more practicality than cultural tolerance. They adopt practices that benefit them, regardless of who initiated the practices.

2. When Constantine the Great moved the capital from Nicomedia (in Anatolia) to Byzantium in 330.

3. The Romans influenced contemporary government