ancient carvings egypt gods Karnak nile Pharaoh ram-headed Ramesses III river nile stone temple Thebes Angkor-Wat angles appearance archaeological archaeology artwork bas-relief battle Battles buddhism cambodia carved craftsmanship culture decorative depictions Designs epic features frieze grainy heritage Hinduism historical history icon iconic low-relief monument ornamental perspectives rough sculpted sculpture shaped shapes stonework stories style surfaces temple-complex temples textured textures walls wars weathered