Colonnades are nothing (but) a perforated wall.阿尔伯蒂 (1452) ，论建筑
墙壁和垂直结构承载着天花板和屋顶，引导我们的行动，包围我们的活动和物品，容纳我们并引导我们从一个地方到另一个地方。墙体分隔出空间，起限定与保护的作用，这是我们得以栖息根基。按照马丁·海德格尔的说法，居住……意味着平静，被带到平静，保持平静。平静这个词，按照弗瑞德的意思，是自由，das Frye， Frye的意思是：免于伤害和危险，免于死亡，受到保护。栖居的基本特征就是这样一种保护。
The walls and the vertical structure are there to carry the ceiling and roof, guide our movements, enclose our activities, our objects and tools, accommodate us and lead us from one place to another. Walls separate and structure architectural space; they demarcate, protect and by this fact enable us to inhabit. To dwell, according to Martin Heidegger, … means to be at peace, to be brought to peace, to remain in peace. The word for peace, Friede, means the free, das Frye, and fry means: preserved from harm and danger, preserved from something , safeguarded.’
One rarely touches walls, just as when one walks round a table for example, an ‘object-peripheral’ gap remains. The walls are ‘opposite’ our eyes. Their modulation, their texture and their ability to accept the display of messages, play a basic role in determining the character and the atmosphere of a place.
Between walls and ceiling are ‘high walls’ which accept a sublime and untouchable role. According to their design, they may belong more to the wall or more to the ceiling.《 Elements of Architecture：From Form to Place 》