An architectural style is a classification of buildings (and nonbuilding structures) based on a set of characteristics and features, including overall appearance, arrangement of the components, method of construction, building materials used, form, size, structural design, and regional character. Architectural styles are frequently associated with a historical epoch (Renaissance style), geographical location (Italian Villa style), or an earlier architectural style (Neo-Gothic style), and are influenced by the corresponding broader artistic style and the "general human condition". Heinrich Wölfflin even declared an analogy between a building and a costume: an "architectural style reflects the attitude and the movement of people in the period concerned". The 21st century construction uses a multitude of styles that are sometimes lumped together as a "contemporary architecture" based on the common trait of extreme reliance on computer-aided architectural design (cf. Parametricism). Folk architecture (also "vernacular architecture") is not a style, but an application of local customs to small-scale construction without clear identity of the builder. Source: Wikipedia (en)