The wall paneling in the last post comes from a Franciscan monastery in France. This is the text panel describing the paneling.

I had a question about the depth of the relief carving. Lower relief panels like the one below range in depth from 3/16″ to 5/16″, averaging one quarter inch from the upper surface to the ground.

The architectural perspective scenes generally have a depth of 3/4″ but several panels have areas where the ground has been excavated to the depth of 1 1/8″.

On some of the panels layout lines made with a knife can still be seen.