When life gives you a giant mosaic, build a museum-hotel. Digging in the soil of Antakya, a small city near Turkey's Syrian border known to the Greeks as Antioch, Nehmi Asfuroglu discovered one of the world's largest and best-preserved ancient mosaics. It was an archaeologist's dream, but Asfuroglu is a developer, and he was hoping to build a hotel on the site. He could have abandoned the project or concealed the discovery, but instead, he funded a seven-month excavation, abandoning the power tools of hotel construction for the manpower of historians from the local university. He hired architect Emre Arolat...