Life of Constantine

For at the side opposite to the cave, which was the eastern side, the church itself was erected; a noble work rising to a vast height, and of great extent both in length and breadth. The interior of this structure was floored with marble slabs of various colors; while the external surface of the walls, which shone with polished stones exactly fitted together, exhibited a degree of splendor in no respect inferior to that of marble. With regard to the roof, it was covered on the outside with lead, as a protection against the rains of winter. But the inner part of the roof, which was finished with sculptured panel work, extended in a series of connected compartments, like a vast sea, over the whole church; and, being overlaid throughout with the purest gold, caused the entire building to glitter as it were with rays of light.