Their massive vaults, carried at both levels by monolithic columns of green and white marble and purple porphyry, serve as buttresses to receive the thrust of the great dome and its supporting arches.

• 它们大块的拱顶，都擒带着同样等级的绿色和白色大理石和紫色斑岩的大块圆柱，作为支撑之用，受到了巨大的圆屋顶和它的支撑拱门的插入。