Ayasofya was a Christian church when it was first built but later became a mosque. Nowadays, it is a national museum. It’s hard to believe that such a delicate architecture was built more than a thousand years ago. Due to the “multi-function” of Ayasofya in the history, you can find both mosaic illustrating that the Emperor and Empress making donation to the Christ Pantocrator and various kinds of traditional Islamic calligraphy. Looking out of the window on the second floor, you will also get a fabulous view of the Blue Mosque!