建筑学 - Ancient chinese architecture

Hi urbandweller, it is in your introduction text...but I missed it in the discussions :-)

Thought I start with a first entry about:

Tulou (土楼; 土樓; tǔlóu), or "earthen building", is a traditional communal residence in the Fujian province of Southern China.

They are mostly built between the 12^th to the 20^th centuries.Tulou is usually a large enclosed building, rectangular or circular in configuration, with a very thick weight supporting earth wall (up to 6 feet thick) and wooden skeletons, from three to five storeys high, housing up to 80 families. These earth buildings usually have only one main gate, guarded by 4-5 inch thick wooden doors reinforced with an outer shell of iron plate. The top level of these earth building have gun holes for defense against bandits.

Although most tulou were of earthen construction, the definition "tulou", is a broadly descriptive label for a building type and does not indicate construction type. Some were constructed of cut granite or had substantial walls of fired brick. Most large-scale tulou seen today were built of a composite of earth, sand, and lime known as sanhetu rather than just earth.

The famous Fujian Tulou, designated as UNESCO World Heritage site in 2008, is a small and specialized subgroup of tulou, and are known for their unique shape, large scale, and ingenious structure. There are more than 20,000 tulou in southern Fujian. Approximately 3,000 of them are Fujian Tulou, that is 15% of tulou belongs to Fujian Tulou category. (copied this information from wikipedia)