Fujian Tulou is a property of 46 houses built between the 12th and 20th centuries over 120 km in south-west of Fujian province, inland from the Taiwan Strait. Set amongst rice, tea and tobacco fields the tulou are earthen houses. Several storeys high, they are built along an inward-looking, circular or square floor plan as housing for up to 800 people each. They were built for defence purposes around a central open courtyard with few windows to the outside and only one entrance. Housing a whole clan, the houses functioned as village units and were known as “a little kingdom for the family” or “bustling small city.” They feature tall fortified mud walls capped by tiled roofs with wide over-hanging eaves. The most elaborate structures date back to the 17th and 18th centuries. The buildings were divided vertically between families with each disposing of two or three rooms on each floor. In contrast with their plain exterior, the inside of the tulou were built for comfort and were often highly decorated. They are inscribed as exceptional examples of a building tradition and function exemplifying a particular type of communal living and defensive organization, and, in terms of their harmonious relationship with their environment, an outstanding example of human settlement.

http://whc.unesco.org/en/list/1113/