Final answer:
The text implies that there are windows in the structure of the Old Minnehaha County Jail, particularly over each first-floor opening in the second story.
Step-by-step explanation:
The question refers to the architectural features of a historic building, specifically the Old Minnehaha County Jail. Based on the snippets provided, which describe various elements of building interiors, the answer would be a window. The description in the text references the back wall being low with the glass roof sloping sharply up, implying that there are windows in the structure. Furthermore, there are mentions of a glass partition and a door into the inner room and an outside door with steps leading down to it, but no mention of paintings or mirrors in direct conjunction with first-floor openings in the second story.