 Building blocks (one with a centaur figure) from a way knocked through a wall in the dale and finds of stones in the Heidenburg area are of the same material and thereby confirm that the stone was quarried from the dale.In the 1990s, extensive archaeological digs were undertaken that unearthed many finds, such as pots (and potsherds) and coins on the Kreimberg plateau.The foundations that were brought to light were photographed, measured and mapped, only to be buried again to keep “collectors” from marring them.