Divided into three volumes, the Encyclopedia of Vernacular Architecture is a basic resource for this new area of study. As stated in Oliver's introduction "Vernacular architecture is now the term most widely used to denote indigenous, tribal, folk, peasant, and traditional architecture." Volume 1 discusses broad concepts such as 'typologies', 'symbolism and decoration', 'environment' and 'materials and building resources'. Volumes 2 and 3 survey vernacular architecture worldwide, arranged by continent followed by region. Both secular and sacred structures are included in this encyclopedia. The structures and building methods discussed are considered within their particular social and environmental context, disregarding political divisions where appropriate. This encyclopedia also provides line drawings, photographs and some architectural plans.