Reliquary theca with first-class relic of Saint Marie-Madeleine Postel, founder of the Sisters of Christian Schools

Oval glass-fronted yellow metal theca housing the first-class ex ossibus (of the bone) pre-canonization relic of Saint Marie-Madeleine Postel. The relic is affixed to a red silk background surrounded by silver wire ornamentation and identified on a typeset cedula label as Ex Ossibus / B. M. Magdal Postel (from the bone of the Blessed Marie-Madeleine Postel). On the back, under a protective cap with an image of the Holy Cross, the theca is secured by a seal of red Spanish wax with an imprint of a coat of arms of an unidentified religious order.

Saint Marie-Madeleine Postel (†1846) was a French Catholic professed religious and the founder of the Sisters of Christian Schools. Postel was also a member of the Third Order of Saint Francis and had served as a schoolteacher after the French Revolution where she oversaw the education of around 300 children. The Revolution saw her use her then-disbanded school to house fugitive priests despite the great risk that posed to her own life. Postel's beatification was celebrated in 1908 and Pope Pius XI later canonized her in mid-1925. Fer feast day is commemorated on July 16,