Made from that mainstay, foam board. Knocked up and painted in an afternoon.
Next up is a more Greco-Roman ruin, also suitable for fantasy games and the like. The columns are plastic wedding cake decorations, crudely sawn into chunks, then filled with filler.
Lastly, assembled in spare time on a otherwise busy weekend, a foam board Tudor house, with card tiling and exposed beams. Not much to look at in the raw:
But it painted up well.