Discover the splendor of Byzantine Istanbul, the ancient city of Constantinople, on this fascinating 3-hour history tour led by an expert guide. The empire that kick-started Christianity in Turkey (around 330 AD) spawned a rich legacy of religious monuments and architecture, and you’ll see the best examples of these on your tour. Visit a shrine to the Holy Virgin at the Church of St Mary of Blachernae, explore the ruins of ancient Blachernae Palace, walk around the Walls of Constantinople, and more!