Oval glass-fronted silver pendant reliquary theca housing a precious first-class ex ossibus (of the bone) relic of Saint Barbara, Martyr. The relic is affixed to a ground of red-colored silk, surrounded by silver wire and gilt paperolle ornamentation, and identified in Latin on a manuscript cedula label as S. Barbarae V. M. (Saint Barbara, Virgin & Martyr). On the back, the theca is secured with a seal of red Spanish wax bearing an imprint of a coat of arms of the (Venerable) Francesco Antonio Marcucci (†1798), Bishop of Montalto (1770-1781), later Titular Patriarch of Constantinople (1781-1798), Confessor and advisor to Pope Clement XIV.
Saint Barbara, known in the Eastern Orthodox Church as the Great Martyr Barbara, was an early Christian saint and martyr who is venerated as one of the Fourteen Holy Helpers. Accounts place her in the 3rd century in Nicomedia, present-day Turkey or in Heliopolis of Phoenicia, present-day Baalbek, Lebanon. She is a holy patron of Armourers, Architects, Artillerymen, Firemen, Mathematicians, Miners, and Prisoners.