What year is marked by the fall of the eastern Roman Empire?

The correct year marking the fall of the Eastern Roman Empire is 1453 AD. This date is significant because it represents the conquest of Constantinople by the Ottoman Empire, led by Sultan Mehmed II. This event is considered the end of the Byzantine Empire, which was the continuation of the Eastern Roman Empire after the fall of the Western Roman Empire in 476 AD. The fall of Constantinople was a pivotal moment in history, leading to significant cultural and political changes in Europe and the rise of Ottoman influence in the region.

The other years listed relate to different historical events. For instance, 476 AD is associated with the fall of the Western Roman Empire when the last Roman emperor, Romulus Augustulus, was deposed. The year 100 AD falls within the peak of the Roman Empire's territorial expansion, while 325 AD is notable for the First Council of Nicaea, which addressed issues within Christianity rather than marking the fall of an empire. Thus, 1453 AD is the correct point in history when the Eastern Roman Empire came to an end.