STRUCTURE (DAILY CELESTIAL CHALLENGE) @sirknightsteemCreated with Sketch.ebadkhan (32)in #celestialchallenge • 7 years ago STRUCTURE Hagia Sophia Once a church, later a mosque, and now a museum, Hagia Sophia is a architectural masterpiece. A perfect example of Byzantine architecture, Hagia Sophia is located in Instanbul, Turkey. #steamstructure #photography