Caisson (Asian architecture)
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The Caisson (Chinese: 藻井; pinyin: zǎojǐng; literally "algae well"), also referred to as a caisson ceiling, or spider web ceiling[1], in East Asian architecture is an architectural feature typically found in the ceiling of temples and palaces, usually at the centre and directly above the main throne, seat, or religious figure.[1][2] The caisson is generally a sunken panel set into the otherwise largely flat[citation needed] ceiling. It is often layered and richly decorated. Common shapes include square, octagon, hexagon, circle, and a combination of these.[3]
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[edit] Name
The caisson is a general name for any sunken panel placed in the ceiling.[4] In the case of East Asian architecture, however, the caisson is characterised by highly developed conventions as to its structure and placement.[2][5]
These are the following:
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[edit] Structure
The caisson is a sunken panel placed in the centre of the ceiling. It is raised above the level of the ceiling through the use the dougong (斗栱) structure, which, through interlocking structural members, as beams were not used, creates successive levels of diminishing size. Beams may also be used to create a hexagonal or octagonal caisson surrounded by a square border. These beams, and the dougong members, are usually visible, and richly carved and often painted with deities.[1]
The centre of the caisson is decorated with a large bas-relief carving or painting. Common themes include "two dragons chasing the pearl. Caissons in the throne rooms of the Forbidden City feature a large, writhing dragon, from whose mouth issue a chandelier-like structure called the Yellow Emperor Mirror, a series of metal balls which are said to be able to show reflections of evil spirits.[6]
Caissons were originally used to support skylights. Therefore they are a relatively recent structure in the Chinese architectural history. However, they became increasingly intricate and formalised, and were in later periods a standard item of interior decoration in formal buildings.[citation needed]
[edit] Use in other structures
The caisson has been found in tombs of the Han Dynasty dating the use of this architectural feature back at least 2,000 years.[7] Besides subterranean structure, the oldest existent caisson in an above-ground structure is the one located above the 16 m (52.5 ft) tall statue of Guanyin in the Guanyin Pavilion of Dule Monastery, Jixian, Hebei province, built in the year 984 during the Liao Dynasty.[8] Without the use of interior columns, this ceiling is held up by a hidden second floor four-sided frame with a hexagonal ceiling frame on the third floor.[8]
In traditional Chinese architecture, every facet of a building was decorated using various materials and techniques. Simple ceiling ornamentations in ordinary buildings were made of wooden strips and covered with paper. More decorative was the lattice ceiling, constructed of woven wooden strips or sorghum stems fastened to the beams. The most decorative and the most complex ceiling was the caisson. Because of the intricacy of its ornamentation, the caisson was reserved for the ceilings of the most important Chinese buildings such as imperial palaces and Buddhist temple altars.[citation needed]
The Baoguo Monastery in Yuyao in Zhejiang has three zaojing in the ceiling, making it unique among surviving examples of Song architecture.[citation needed] Sanquing Hall (Hall of the Three Purities) is the only Yuan period structure with "three" zaojing in its ceiling.[citation needed] A zaojing is a wooden dome over an imperial throne or statue in Chinese architecture.[9]
As the caisson became increasingly standard in formal architecture in ancient China, similar structures also appeared in Buddhist grottos, such as in Dunhuang. These sunken panels in the ceiling of grottos would be carved to imitate the dougong-based structure in wooden buildings.[citation needed]
[edit] Cultural significance
Caissons where highly decorative and used only for the most richly decorated structures. They had no specific cultural significance, since in structure they are equal to cupolas and domes constructed around the world. However the rich oramentation often conveyed cultural significance in the themes chosen.
[edit] Notes
- ^ a b c Zaojing ceiling. taiwanschoolnet.org. Retrieved on 2007-09-03.
- ^ a b 浅谈法海寺曼陀罗的深刻内涵 (Deep meaning of the Mandala in the Fahai Temple in Brief) (Chinese). Beijing Municipal Administration of Cultural Heritage (4 2006). Retrieved on 2007-10-30.
- ^ Caisson ceiling (Zaojing). peopledaily.com. Retrieved on 2007-09-03.
- ^ Oxford English Dictionary, (1989) Oxford University Press, caisson
- ^ 礼制对中国古建筑的影响 (Influence of Rites on Ancient Chinese Architecture) (Chinese). Construction Engineering Education Net (8 2006). Retrieved on 2007-10-30.
- ^ Yu, Zhuoyun (1984). Palaces of the Forbidden City. New York: Viking. ISBN 0-670-53721-7., pp 253ff
- ^ Caisson ceiling. chinainfoonline.com. Retrieved on 2007-09-13.
- ^ a b Steinhardt, Nancy Shatzman. "Liao: An Architectural Tradition in the Making," Artibus Asiae (Volume 54, Number 1/2, 1994): 5–39. Page 11.
- ^ Ching et al, Francis D.K. (2007). A Global History of Architecture. New York: John Wiley and Sons, p. 787. ISBN 0-471-82451-3.
