Photos from Istanbul Arriving back from a Bosphoros Tour in Istanbul Gateway to the Topkapi Palace At the Nurol Group tower overlooking the Bosphorus In the executive suite of the Nurol group in Istanbul In front of the only mosque with 6 minarets: the Blue Mosque in Turkey Hagia Sophia, Holy Wisdom: Justinian the Great built this church in the 6th Century. At the time, it was the largest church in the world. After the conquest in 1453, the Ottomans turned it into a mosque. It became a museum in the Republic period.