Istanbul is one of the rare metropolises that attract both tourists and citizens from all over the world. Due to its history, it has embraced many different civilizations, religions, and cultures, so we can say that Istanbul is a cosmopolitan metropolis. It is safe to say that religion in Istanbul has a lot of diversity to offer. Also, Istanbul, which connects Europe and Asia due to its location, has been the home of various civilizations for thousands of years. So, the coexistence of different nations in Istanbul has led to much religious and cultural diversity.