An ecclesial community is, in Roman Catholic terminology, a Christian religious group that does not meet the Roman Catholic definition of a "Church". The Catholic Church applies the term "Church" in the proper sense only to Christian communities that, in the Catholic Church's view, "have true sacraments and above all – because of the apostolic succession – the priesthood and the Eucharist".[1]
The Catholic Church formally recognizes as "Churches" of a nature similar to its own particular Churches (dioceses and autonomous or sui iuris Churches) the Eastern Churches separated from full communion with it,[1] namely those of Eastern Orthodoxy, Oriental Orthodoxy, and Church of the East. It has not denied the claim of some communities of Western Christianity to meet the Roman Catholic Church's definition of "Church" (an example is the Polish National Catholic Church). Indeed, by referring to "The Separated Churches and Ecclesial Communities in the West",[2] the Second Vatican Council recognized the existence of some Western Churches that are not in full communion with the see of Rome.
However, the Catholic Church expressly excludes "those Christian communities born out of the Reformation of the sixteenth century", since, according to Catholic doctrine, these communities do not enjoy apostolic succession in the sacrament of Orders, and therefore lack a constitutive element of the Church.[3] This includes the Anglican Communion, the validity of whose Orders and consequently of whose Eucharist the Roman Catholic Church has declared "absolutely null and utterly void". This judgement, as enunciated in the papal bull Apostolicae Curae of 1896, has been given as an example of a truth connected to revelation that is to be held definitively.[4]