FANCY FLOOR. Building 100’s second story had terrazzo-style floors made of a base layer of coarse limestone fragments, topped by a thick layer of fine sediment and calcite crystals. Once hardened and polished, the surface gave the floors a smooth, shimmering quality and reddish color. When Building 100 burned down, the top story collapsed and fell down to the ground level, where pieces of the floor, including this roughly 3-foot-wide fragment, were found, together with other luxury items that originally furnished the building’s second floor.