A considerable part of architectural innovation involves the use of materials. Technical development and new formal languages utilize them to "announce" the "next" architectural era. Of course, materials are essential for construction and significant for the consolidation of languages. Glass, steel, concrete, or brick convey messages about buildings. However, like any language, the meaning of words can vary according to the prevailing social organization; there is a dispute over the meaning of certain expressions, or there is pressure for the abolition—or at least the dissociation—of certain senses associated with some words. It would not be any different in architecture.
