What was the main religion of Russia, particularly the capital of religious influence?

The question focuses on the main religion of Russia and its capital of religious influence. The correct answer identifies Christianity, particularly the Orthodox branch, as the dominant faith in Russia. The significant historical context surrounding this is the establishment of Christianity in the region, especially when it was adopted by Prince Vladimir of Kiev in 988 AD. This pivotal conversion played a crucial role in shaping the cultural and religious landscape of what would become Russia.

Constantinople, the capital of the Byzantine Empire, was an important center for Orthodox Christianity and a vital influence on Russian Christianity, particularly through the spread of Orthodox teachings and practices. The connection between the Russian Orthodox Church and Constantinople remains significant, as it was there that many of the theological foundations of Russian Orthodoxy were laid.

Other options, while they have their relevance, do not accurately reflect the main religion of Russia or its greatest center of influence. Paganism was prevalent before the Christianization of Kievan Rus, and Islam is more closely associated with certain regions within Russia rather than being the dominant faith across the entire country. Thus, recognizing Christianity, specifically through the lens of Orthodox tradition and its ties to Constantinople, aligns with historical, cultural, and religious narratives pertinent to Russia's identity.