Tianluokeng Tulou cluster

Tianluokeng tulou cluster is one of the better known Fujian Tulou cluster. It is located in Fujian province, Zhangzhou City, Nanjing County, Shuyang Township, Tian Luo Keng Village (literally "Snail Pit" Village) in southern China.

The cluster consists of a square earth building at the center of a quincunx, surrounded by four round earth buildings (or more exactly, 3 round earth buildings and one oval shape earth building), figuratively nicknamed Si cai yi tang" (four dishes with a soup).

A tulou (lit. "earth building") is a unique architecture found only in the mountainous areas bordering Fujian and Guangdong in southern China. The "Earth building" is an enclosed buildings, usually square or circular in shape, with a very thick earth wall (up to 6 feet thick) and wooden skeletons, from three to five storeys high, housing up to 80 families. These earth buildings have only one entrance, guarded by 4–5-inch-thick (100–130 mm) wooden doors re-enforced with an outer shell of iron plate. The top level of these earth building have gun holes for defence against bandits. In spite of the earth wall, some of them are more than 700 years old, surviving thru centuries of natural elements, including earthquakes, yet still standing solid. There are more than 35,000 earth buildings to be found in southern China, among them a little over 3,000 have being classified as Fujian Tulou.