The İznik Hagia Sophia, also known as the {Hagia Sophia of İznik}, is a historic church located in the town of İznik, Turkey. Originally built in the 4th century, it served as a significant center for early Christianity and was later converted into a mosque after the Ottoman conquest in the 15th century. The structure showcases a blend of Byzantine architecture and Islamic influences. Today, the İznik Hagia Sophia is recognized for its stunning mosaics and intricate frescoes, which reflect its rich history. It is an important cultural and architectural landmark, attracting visitors interested in both its religious significance and artistic heritage.