Menu

A stone wall protecting a city

A wall is a vertical dividing surface. It divides space in buildings into rooms or protects buildings. It is usually made of stone or brick. Walls have two main purposes: to support the top part of buildings, and to divide space, giving protection from invasion, escape, and weather.

Before powerful artillery was invented, many cities had protective walls. Since they are not suitable for defense any more, most city walls have been removed.