Russia's Claim on Istanbul and the Hagia Sophia

This past week we have seen the world reacting to the reconversion of Hagia Sophia in Istanbul from a museum back into a mosque by decision on July 10th of Turkey’s President Erdogan. The so-called Christian world, especially in the east, has been riled by this move. Patriarch Kirill of Russia indicated it would cause deep pain to the Russian people. Pope Francis has also expressed his great sadness.