This is a pic taken under the sidewalk on the 100 block of S. Gay Street near Unarmed Merchants and shows glass panels in the older sidewalk which provided lighting for basement areas under the pre1919 sidewalk.
This is a pic looking south from the western sidewalk and shows what may be an original storefront.
This is a pic of what may be one of the old underground storefronts on the western side of S. Gay Street looking north. The headroom here is low which probably contributed to the preservation of this space.
This pic is taken on the old sidewalk on the 100 block of S. Gay Street on the western side, looking south.