赵州桥建于何时 ?历来众说纷纭 ,莫衷一是。大体上有以下四种观点 :一是认为建于隋炀帝在位期间 ( 6 0 5 -6 16年 ) ;二是《中国赵州桥》和《中国少年儿童百科全书》均标为隋开皇十一至十九年 ( 5 91-5 99年 ) ;三是 1991年中美两国土木工程师学会在赵州桥建立铜牌纪念碑和石刻 Zhaozhou Bridge was built when? Has always been divergent views, implausible. Generally speaking, there are the following four points: First, it is believed that it was built during the reign of Sui Dynasty (600-616); second, “Zhaozhou Bridge in China” and “Encyclopedia of Chinese Children” were labeled as Sui Kai Emperor eleven to nineteen years (5 91-599 years); Third, in 1991 the Chinese and American civil engineers in the Zhaozhou Bridge to build bronze monuments and stone