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Anji Bridge
The Anji Bridge () is the world's oldest open-spandrel segmental arch bridge of stone construction.〔This title strictly applies only to the ''sum of attributes given'' (O’Connor, Colin: ''Roman Bridges'', Cambridge University Press 1993, ISBN 0-521-39326-4, p.171): Various Roman stone pillar bridges featured wooden open-spandrel segmental arches as early as the 2nd century CE, among them Trajan's bridge, the longest bridge of the world to have been built for over a thousand years. Also, a dozen or more Roman close-spandrel stone segmental arch bridges are known from the 1st century BC onwards, such as the Ponte San Lorenzo (Padua), Alconétar Bridge and the Makestos Bridge (Turkey), the last having half-open spandrels. The 27 segmental arches of the Bridge at Limyra (300 ce) feature span to rise ratios between 5.3 and 6.5 to 1, making it an earlier example of a stone quarter circle segmental arch bridge. This leaves the Anji bridge the title of "the oldest ''open-spandrel'' stone quarter circle segmental arch bridge in the world".〕 Credited to the design of a craftsman named Li Chun, the bridge was constructed in the years 595-605 during the Sui dynasty (581–618). Located in the southern part of Hebei Province, it is the oldest standing bridge in China.
== Name and location ==
The bridge is also commonly known as the Zhaozhou Bridge (), after Zhao County, which was formerly known as Zhaozhou (趙州). Another name for the bridge is the Great Stone Bridge (). It crosses the Xiaohe River (洨河) in Zhao County, approximately southeast of the provincial capital Shijiazhuang. It is a pedestrian bridge and is currently open to the public.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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