Churches in Istanbul is a book an interesting aspect of a city of many colours and many worlds: Once ´the Rome of the East´ , Istanbul has housed many religions, and still remains an attraction for visitors who wish to explore the memory of a distant past. The religious sites of the Christian peoples who worshipped in the city gives one the opportunity to do just that. Some of these churches are still active, some are in ruins, and some have been turned into mosques - but they all carry the crent of history