Form follows function
Form follows function is a principle of design associated with late 19th- and early 20th-century architecture and industrial design in general, which states that the appearance and structure of a building or object (architectural form) should primarily relate to its intended function or purpose. == Origins of the phrase == The architect Louis Sullivan coined the maxim, which encapsulates Viollet-le-Duc's theories: "a rationally designed structure may not necessarily be beautiful but no building can be beautiful that does not have a rationally designed structure".