The Hagia Sophia of Iznik, also known as the Church of St. Sophia, is a historic building located in the town of Iznik, Turkey. Originally constructed as a Christian basilica in the 4th century, it later became a mosque after the Ottoman Empire conquered the region. The structure is renowned for its impressive architecture and beautiful mosaics, reflecting both Byzantine and Islamic influences. Today, the Hagia Sophia of Iznik serves as a museum, attracting visitors interested in its rich history and artistic heritage. The building's unique design features a large dome and intricate tile work, making it a significant example of early Christian architecture in Anatolia.