China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 http://47.114.119.106/tgaz/placename/hvd_43042 開城縣 开城县 Kaicheng Xian 县 縣 xian county 620 4 623 4 POINT point N 31.29249 E 117.73012 FROM_AC 巢州 Chao Zhou
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CHGIS 开城县（620—623年）
唐武德三年（620年）分襄安县置。属巢州。七年（624年）州、县皆废。①故治即今安徽无为县西开城镇。②
①《旧唐书》卷40《地理志三》：庐州巢县：“隋为襄安县。武德三年置巢州，分襄安立开城、扶阳二县。七年废巢州及开城、扶阳二县，改襄安为巢县，属庐州。”（第5册，1576页）
②《清嘉庆一统志》第41册，卷123《庐州府二古迹》：“开城废县，在无为州西。唐武德三年置。属巢州。七年废。州志：今为开城镇，在州西四十里。”今无为县西有开城镇，当是。见《安徽省地图册》，中国地图出版社，2002年。