In most cases, the materials of buildings often reflect the popular styles of the time period in which the building was constructed.
「外衣」也隨著世界潮流，由貼滿馬賽克（小磁磚），而至雄偉、氣派的玻璃帷幕，直到最近復古的中式、歐式建築。但建築的造型卻極為類似﹘﹘四四方方、高度相若、整整齊齊地比鄰而立，使市容顯得擁擠、單調。