Final answer:
The significant factors that contributed to the long survival of the Byzantine Empire include its strong economy, skilled diplomacy, and religious conviction.
Step-by-step explanation:
The longevity of the Byzantine Empire can be attributed to several significant factors. Firstly, its strong economy and prosperous trade networks contributed to its survival. The city of Constantinople, with its large population and extensive international trade, provided a stable economic foundation for the empire.
Secondly, the Byzantines were skilled diplomats who utilized diplomacy to form alliances and negotiate treaties with other states. They also employed underhanded tactics, such as supporting exiled royalty, to undermine their enemies.
Finally, the Byzantines' religious conviction played a crucial role in their survival. They believed that their empire and emperor were divinely protected, and Constantinople was seen as the rightful seat of the Christian religion. This religious legitimacy and the support it garnered helped the empire endure for around 1,000 years.