據介紹,潼(tong)(tong)(tong)(tong)關(guan)(guan)為中國(guo)古(gu)代著名(ming)的關(guan)(guan)隘之一,位于(yu)秦、晉、豫三省要沖(chong)的黃河、渭(wei)河交(jiao)匯(hui)處南岸(an)臺地上。據文獻記載,潼(tong)(tong)(tong)(tong)關(guan)(guan)在(zai)東漢(han)以前還未設關(guan)(guan)城(cheng),東漢(han)末年(nian),曹(cao)操(cao)為防(fang)御關(guan)(guan)西(xi)兵亂(luan),于(yu)建安元年(nian)(公元196年(nian))始設潼(tong)(tong)(tong)(tong)關(guan)(guan),同時廢(fei)(fei)棄函谷(gu)關(guan)(guan)。到(dao)隋大業七年(nian)(611年(nian)),移關(guan)(guan)城(cheng)于(yu)南北連城(cheng)間的坑獸檻谷(gu),即(ji)禁溝口(kou)。唐天授二年(nian)(691年(nian)),又遷隋潼(tong)(tong)(tong)(tong)關(guan)(guan)城(cheng)于(yu)黃、渭(wei)河南岸(an)。1959年(nian)因修建三門(men)峽(xia)水庫(ku),潼(tong)(tong)(tong)(tong)關(guan)(guan)城(cheng)搬遷而廢(fei)(fei)沒(mei)。
潼關(guan)十(shi)二連(lian)(lian)城(cheng)是當地著名(ming)的(de)(de)(de)(de)文物遺(yi)(yi)(yi)址(zhi)(zhi),又(you)名(ming)烽(feng)(feng)火(huo)(huo)臺,俗稱(cheng)墩臺,位于距潼關(guan)縣(xian)城(cheng)東約三公里的(de)(de)(de)(de)禁(jin)溝西(xi)(xi)岸(an)。此(ci)次,他們(men)在十(shi)二連(lian)(lian)城(cheng)烽(feng)(feng)火(huo)(huo)臺遺(yi)(yi)(yi)址(zhi)(zhi)沿線獲得重要發現——在距離“北七烽(feng)(feng)火(huo)(huo)臺遺(yi)(yi)(yi)址(zhi)(zhi)”西(xi)(xi)北20米(mi)處的(de)(de)(de)(de)禁(jin)溝崖壁上,發現了(le)約15厘米(mi)厚的(de)(de)(de)(de)漢(han)代(dai)(dai)建筑(zhu)材料堆積層,現場出土(tu)了(le)繩紋板瓦等遺(yi)(yi)(yi)物。十(shi)二連(lian)(lian)城(cheng)烽(feng)(feng)火(huo)(huo)臺遺(yi)(yi)(yi)址(zhi)(zhi)為早(zao)年公布的(de)(de)(de)(de)省級文物保護單位,其(qi)時(shi)代(dai)(dai)原定為唐—清。后有學者認為其(qi)時(shi)代(dai)(dai)上限(xian)應在漢(han)魏(wei)時(shi)期(qi),還有學者認為其(qi)時(shi)代(dai)(dai)當早(zao)到西(xi)(xi)周。專家(jia)組這次實地指導(dao)直接深入一線,通過(guo)細(xi)致的(de)(de)(de)(de)訪詢復查,解決了(le)不少疑(yi)難問題。這次的(de)(de)(de)(de)重要發現,為十(shi)二連(lian)(lian)城(cheng)烽(feng)(feng)火(huo)(huo)臺遺(yi)(yi)(yi)址(zhi)(zhi)的(de)(de)(de)(de)年代(dai)(dai)定性提供了(le)珍貴的(de)(de)(de)(de)第一手(shou)實物資料。