1) Architectural element
Found on
https://www.crosswordclues.com/clue/staircase-tower
A staircase tower is a wing of a building or an enclosed room within it that houses a staircase linking the various storeys to one another. A staircase tower enables the various floors of a multi-storey building to be connected vertically to one another. It is thus a functional component of the building. In modern buildings, the staircase tower of...
Found on
http://en.wikipedia.org/wiki/Staircase_tower
No exact match found.
