Reliquary theca with relic of St. Angelus of Jerusalem, Carmelite Martyr

Round glass-fronted yellow-metal reliquary theca housing the first-class ex ossibus (of the bone) relic of Saint Angelus of Jerusalem. The relic is affixed to a red silk ground and identified in Latin on a typeset cedula label as S. Angeli Carm. (Saint Angelus, Carmelite). 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 Order of the Brothers of the Blessed Virgin Mary of Mount Carmel, (known as the Carmelite Order).

Saint Angelus of Jerusalem (†1220) was a Catholic convert from Judaism and a professed priest of the Carmelites. He and his twin brother were converted to the faith once their mother did so while both became ordained priests and Carmelite friars. But, unlike his brother he retreated into the desert to a hermitage after his ordination. He emerged once he was instructed to go to the Italian mainland to evangelize as well as to meet with Pope Honorius III to have him approve a new rule for the Carmelites.​ He was slain whilst preaching and was believed a saint after his death. The Carmelites venerated him as such until Pope Pius II beatified the slain priest during his pontificate circa 1459.