The term vernacular architecture can be used interchangeably with the terms folk, common, native, traditional and is usually placed at the other end of the spectrum from professionally designed building by architects. The building knowledge in vernacular architecture is based on local traditions and is thus based largely upon knowledge handed down through the generations. Different regions in Ukraine had their own distinctive style of vernacular architecture. For example, in the Carpathian Mountains and the surrounding foothills, wood and clay are the primary traditional building materials.