Hagia Sophia: The Jewel of Christendom Mins :76 DocumentaryNonfiction In this adult education lecture, Dr. William J. Neidinger examines the history of Hagia Sophia (once a church, then a mosque, and now a museum): its construction, re-buildings, and refurbishings with each new conqueror of Constantinople. Watch on Amazon Previous articleBrawl Stars Gameplay With Mega MikeNext articleThe History of Christianity. Lecture 6 of 30. Judaism and Christianity.