The Site :
The castle of Haut Koenigsbourg has been constructed upon the Staufenberg which is a rocky spur. It is one of the reasons that pushed Frederic II to choose this site. Indeed, during the construction, it didn’t have been oblige to find a career while the sandstone was there. To detach the stone, the quarrymen drew a right line on the rock. To every twenty centimetre, they dug a small hole. In each holes was sink a corner. A worker gave a stroke of mass upon the first corner then upon the second until the last of the row. He restarted thus until the rock splits itself. These works permitted to get the stones able to the building but also sculpted the rock according to the defensive needs. The small rocks pieces were used to form the blockage which added to the wall solidity.