And centered beneath the dome was the reason why all those feet had come to this chamber. A sword, hanging hilt down in the air, apparently without support, seemingly where anyone could reach out and take it. It revolved slowly, as if some breath of air caught it. Yet it was not really a sword. It seemed made of glass, or perhaps crystal, blade and hilt and crossguard, catching such light as there was and shattering it into a thousand glitters and flashes.