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 big entrance porch with internal double swing doors suitable for use when constructing an inn, hotel or perhaps even a station building from the series units. Seen by itself in the foreground on the right, and in the centre of the building further back, made from components as listed in the Round Tower description, but with different bay windows.