Given the technical difficulties of building in this region, where it is a matter of hewing out structures within the natural rock, creating architecture by the removal of material rather than by putting it together to form the elements of a building, the underlying morphological structure and the difficulties inherent in the handling of the material inhibited the creative impulses of the builders. This conditioning of human effort by natural conditions persisted almost unchanged through successive periods and civilizations, influencing the cultural attitudes and technical skills of each succeeding generation.
Protection and management requirements