Herem is the highest ecclesiastical censure in the Jewish community. It is the total exclusion of a person from the Jewish community. It is a form of shunning and is similar to vitandus "excommunication" in the Catholic Church. Cognate terms in other Semitic languages include the Arabic terms ḥarām "forbidden, taboo, off-limits, or immoral" and haram "set apart, sanctuary", and the Ge'ez word ʿirm "accursed".
Herem placed on the Hasidim by the Vilna Gaon in 1781
Excommunication is an institutional act of religious censure used to deprive, suspend, or limit membership in a religious community or to restrict certain rights within it, in particular those of being in communion with other members of the congregation, and of receiving the sacraments.
Fanciful 16th-century fresco in the Sala Regia, by Giorgio Vasari, depicting Pope Gregory IX excommunicating Frederick II. Since few details were provided to the artist, Vasari chose to paint an excommunication scene generically. In the traditional excommunication procedure, the pope and his priests would hurl burning candles on the ground and stamp them out. The painter however here chose to show the pope personally stepping on the emperor.
Plaque on exterior of the Chiesa della Pietà in Venice, the church of the orphanage. This is where the foundling wheel once stood. The inscription declares, citing a 12 November 1548 papal bull of Pope Paul III, that God inflicts "maledictions and excommunications" on all who abandon a child of theirs whom they have the means to rear, and that they cannot be absolved unless they first refund all expenses incurred.
Martin Luther was excommunicated by Pope Leo X in 1521.
Threat of excommunication for stealing books from the Salamanca University library