"It is," she said quietly, leaning against a rusted railing heedless of the danger. "Originally, most of humanity lived there. It floated above the surface and was an enclosed planet of it's own. They called it Cocoon."

Yeul kept her eyes fixed on it.

"Then it began to fall," she continued, "and two people gave their lives and turned to crystal to catch it. Some say they're still alive, just sleeping inside the pillar that supports the old world. If they falter, the world will fall and everyone will die."

And it would fall, eventually.

"The two people who saved the world are named Oerba Dia Vanille and Oerba Yun Fang. They came from here." In case the names hadn't given it away. "No one touches this city because of them. This is their memorial, a reminder of the home they once had."