The Poor Souls Altar
The Poor Souls Altar depicts a soul being raised from purgatory to be united with Christ through the intercession of the priest at Mass.
You can see two of the remaining light bulbs, of the 2000, that decorated the High Altar and various arches. That was the tradition at the time. The light bulbs were removed in 1952.
The Latin phrase at the bottom inset of the Altar is translated as “The written book will be brought forth, in which the whole (record of evidence) is contained whence the world is to be judged.”