When you come to Turkey, you must see St. Sophia's Cathedral in the old city, which is a masterpiece of Byzantine architecture. Saint Sophia Cathedral is the Central Church of the Orthodox Church built in Byzantine times. It is quite magnificent and magnificent. It fully reflects the outstanding architectural art and is absolutely a model of the architectural community. Later, the Ottoman Empire destroyed the Eastern Roman Empire. When Islam cleansed the pagan religion, it did not have the heart to destroy the symbol of the pagan religion, the Cathedral of Saint Sophia, but transformed it into a mosque. [Overall Feeling] Finally came to St. Sophia's Cathedral, which was full of expectation and excitement. St. Sophia's Cathedral has created many of the world's first churches, and the beauty of the cathedral makes us wonder. First enter the church, we have to know that St. Sophia Cathedral is repaired all year round, you can only see half of the church, the other half is always repaired. Entering the church, we marveled at the luxurious marble floor, which has remained intact for so many years. Take a look at the famous murals on the wall. The huge yellow dome will surely shock you. In addition, St. Sophia Cathedral has a second floor, so you must go to the second floor to see it, you can experience the beauty of the cathedral more closely!