In the middle of the west parapet of Ponte Cestio is located this plaque commemorating the restoration carried out by emperors Valentinianus, Valens and Gratianus and dedicated to the last one on 370 AD. On the two external sides of the bridge was engraved this two identical inscriptions, synthesis of the very long text of the plaque, almost completely lost during the bridge rebuilding at the end of XIX century. GRATIANI TRIVMPHALIS PRINCIPIS PONTEM AETERNITATI AVGVSTI NOMINIS CONSECRATVM IN VSVM SENATVS POPVLIQ ROMANI DDD NNN VALENTINIANVS VALENS ET GRATIANVS VICTORES MAXIMI AC PERENNES AVGVSTI INCOHARI PERFICI DEDICARIQ JVSSERVNT [Our lords Valentinianus Valens and Gratianus max victors and massimi e perpetual augusti ordered to begin, complete and dedicate the bridge of triumpher Gratianus destined to keep in eternity his augustus name and to be of use to senatus and roman people] This is the reconstructed text of the plaque: DOMINI NOSTRI IMPERATORES CAESARES FL. VALENTINIANVS PIVS FELIX MAXIMVM VICTOR AC TRIVMF. SEMPER AVG. PONTIF. MAXIMVS GERMANIC. MAX ALAMANN. MAX. FRANC. MAX GOTHIC. MAX TRIB. POT. VII IMP. VI CONS. II PPP ET FL. VALENS PIVS FELIX MAX VICTOR AC TRIVMF. SEMPER AVG. PONTIF. MAXIMVS GERMANIC. MAX ALAMANN. MAX. FRANC. MAX GOTHIC. MAX TRIB. POT. VII IMP. VI CONS. II PPP ET FL. GRATIANVS PIVS FELIX MAX. VICTOR AC TRIVMF. SEMPER AVG. PONTIF. MAXIMVS GERMANIC. MAX ALAMANN. MAX FRANC. MAX GOTHIC. MAX TRIB. POT. III IMP. II CONS. PRIMVM PPP. PONTEM FELICIS NOMINIS GRATIANI IN VSVM SENATVS AC POPVLI ROM. CONSTITVI DEDICARIQ. IVSSERVNT The inscription is worn and not clearly readable and has been furtherly damaged by cleaning works carried out during 2000 Jubilee.