Reliquary theca with relics of St. John Gabriel Perboyre, C.M., Martyr of China

Round glass-fronted yellow-metal reliquary theca housing the first-class ex ossibus (of the bone) pre-canonization relic of Saint John Gabriel Perboyre. The relic is affixed to a red silk ground and identified in Latin on a typeset cedula label as B. J. G. Perboyre, M. (Blessed John Gabriel Perboyre, Martyr). On the back, under the protective cap, the theca is secured with a seal of red Spanish wax bearing an imprint of a crest of the Congregation of the Mission (known as the Vincentians).

Saint John Gabriel Perboyre, C.M. (French: Jean-Gabriel Perboyre †1840), was a French priest, who served as a missionary in China, where he became a martyr. After the then-obligatory waiting period of 50 years after death for seeking a person's canonization had expired, a cause for him was introduced to the Holy See. He was beatified by Pope Leo XIII in 1889, and later canonized by Pope John Paul II in 1996. In the meantime, his remains were returned from China to France, where they were entombed for veneration in the chapel of the Vincentian Motherhouse in Paris.