From Affiliate Member Glen Granholm: "While this building, built in the sixth century, is world famous; one feature that makes this structure particularly interesting is how earthquake resilient it is. It has withstood dozens of large earthquakes -- temblors that have destroyed much of the rest of Istanbul over the millennia. It's dome shape with unique, seemingly self-curing mortar that restores itself after earthquakes makes the building, 'the Eye of Sophia,' a wonder to behold."