The main wall had an inner and outer shell of masonry with cross-walls between, forming rectangular spaces filled with rubble. The outer shell was especially strong, because it was constructed with massive stones of irregular polygonal shape. These stones measured one to five meters respectively. Above this there would have been a superstructure of brick work that obviously did not survive. There were also projecting towers at intervals of around one hundred feet.
Archeologists are uncertain about the inner structure of the wall.
They have concluded that it was either constructed with innumerable buttresses or solid turrets at short intervals. The Lion's Gate The gate on the far west of the fortified wall known for the two figures in high relief showing the head and forepart of a lion on the outer side of each gate post. These sculptural figures are part of the art itself, not added to it. Notice of the size of the stones can give some idea of the relative colossal size of the constructed wall itself when it was in prime shape. Another interesting aspect of this gate is the element of arched entrance ways.