Oval glass-fronted brass reliquary theca housing first-class ex ossibus (of the bone) relic of Saints Gervasius. The relic is affixed to a red silk ground surrounded by gilt paperolle ornamentation and identified in Latin on a manuscript cedula label as S. Gerasÿ M. (Saints Gervasius, Martyr). On the back, the theca is secured with a perfectly preserved seal of red Spanish wax bearing an imprint with a coat of arms of Fr. Antonio Cantoni (†1781), Bishop of Faenza, Italy (1742–1767) and Archbishop of Ravenna, Italy (1767–1781).
Saints Gervasius and Protasius are venerated as Christian martyrs, probably of the 2nd century. They are the patron saints of Milan and of haymakers and are invoked for the discovery of thieves. Their feast day in the Latin Rite of the Catholic Church is 19 June, the day marking the translation of their relics. In the Eastern Orthodox Church and in the Eastern Rites of the Catholic Church, their feast takes place on 14 October (O.S.)/24 October (N.S.), the traditional day of their death.