San Pietro in Vincoli (“in vincoli”-“in chains” in Italian) was built on the ruins of an ancient temple dating from the 3rd century in 432-440 to house the relic of the chains that bound Saint Peter when he was imprisoned in Jerusalem. The Empress Eudoxia, who was the wife of Emperor Valentinian III received them as a gift from her mother, who respectively received them from Iuvenalis, bishop of Jerusalem; the former presented the chains to Pope Leo I...
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