Part of a set of components which may be assembled in all sorts of ways to create a wide variety of stone buildings ranging from simple farmhouses through posher urban terraces to more complex villas, hotels and even palatial manors, but without putting undue strain on system resources because the same basic units may be used again and again in various combinations.
A multi-purpose addition to the series, the spacer can be used as a roof-ridge between adjacent buildings, as a raised gable at the end of a building, or, if dropped down to just below roof level, as an alternative end to a main unit to give a blank wall rather than one with windows.