The Marble Faun, Volume II by Nathaniel Hawthorne

Still gliding onward, Hilda now looked up into the dome, where the sunshine came through the western windows, and threw across long shafts of light. They rested upon the mosaic figures of two evangelists above the cornice. These great beams of radiance, traversing what seemed the empty space, were made visible in misty glory, by the holy cloud of incense, else unseen, which had risen into the middle dome. It was to Hilda as if she beheld the worship of the priest and people ascending heavenward, purified from its alloy of earth, and acquiring celestial substance in the golden atmosphere to which it aspired, She wondered if angels did not sometimes hover within the dome, and show themselves, in brief glimpses, floating amid the sunshine and the glorified vapor, to those who devoutly worshipped on the pavement.

She had now come into the southern transept. Around this portion of the church are ranged a number of confessionals. They are small tabernacles of carved wood, with a closet for the priest in the centre; and, on either side, a space for a penitent to kneel, and breathe his confession through a perforated auricle into the good father's ear. Observing this arrangement, though already familiar to her, our poor Hilda was anew impressed with the infinite convenience -- if we may use so poor a phrase -- of the Catholic religion to its devout believers.