A Whisper Gallery is the location that the Soul Hunters store the souls they have collected so that they may "converse" for all eternity.[1] The walls are lined with small alcoves where each of the soul globes are rested.
The Galleries are defended by automated defenses including Guardian drones programmed to eliminate grave robbers.
It is also the name the Minbari give for the chamber in which a subject experiences the Dreaming.[2]