The Mountain Gate of the Acropolis of Athens, translated as Propylaea, was built between 437 and 432 B.C. by the architect Manesicles, in order to make an asymmetric form according to local conditions. The front is 18 meters high and the side is 13 meters high. The main building is multi-Rick pillar, one of which is particularly large, with a net width of 3.85 meters, highlighting the door. The roof is divided into two sections because of the tilt of the ground, so that the front and back facades are in the same shape. The interior adopts Ioni pillar style, with gorgeous decoration. The appearance is simple and solemn.