In the part of France where my family comes from, limestone is abundant and makes perfect building material. The amount of skill that went into building walls always amazes me.
More to come, if you are interested.
Isn't it the purpose of a forum to post more about a given subject in the same thread?
This picture should tell you a bit more about the context.
The walls look like some kind of gigantic jigsaw puzzle, but there is a reason for the individual layers not to have the same thickness: the stones themselves come in layers in the quarries. The stone layers did not have to select or shape them individually... Still: it takes lots of skill to mount a good stone wall.
This was indeed what I was trying to do: taking details of the buildings construction in insulation to bring more attention to the construction. On the house above, I got this:
