河北正定隆兴寺御书楼前现存一方唐代成德镇首任节度使李宝臣的残碑。由于历代典籍多未著录,以致于此碑长期以来未得到学界注意。此碑应为神道碑,刻立于建中二年正月至十二月之间。尽管碑文残缺严重,但具有重要史料和书法价值。 Hebei Zhengding Longxing Temple Yu bookstore before the existence of a party Tang Dynasty Chengde first Jiedushi Li Baochen’s remnants. Because many ancient books have not been recorded, so that this monument has long been not academic attention. This monument should be a monument of God, carved in Jianzhong two years from January to December. Although incomplete inscriptions, but has important historical and calligraphy value.