In Christianity, concelebration (from Lat., con + celebrare, to celebrate together) is the presiding of a number of presbyters (priests or ministers) at the celebration of the Eucharist with either a presbyter or bishop as the principal celebrant and the other presbyters and bishops present in the chancel assisting in the consecration of the Eucharist. The concelebrants assist the principal celebrant by reciting the Words of Consecration together with him, thus effecting the change of the eucharistic elements. They may also recite portions of the Eucharistic Prayer. Concelebration is often practiced by ministers of Churches that are in full communion with one another, e.g. the Anglican Communion and the Old Catholic Church.