Can Non-Catholic Christians be admitted to sacramental communion in the Roman Catholic Church?

As Catholics, we believe that the celebration of the Eucharist is a sign of our oneness in faith, life and worship. Members of churches with whom we are not yet fully united are therefore not ordinarily invited to participate in Holy Communion. The Catechism of the Catholic Church reflects on this teaching. Ecclesial communities derived from the Reformation and separated from the Catholic Church, "have not preserved the proper reality of the Eucharistic mystery in its fullness, especially because of the absence of the sacrament of Holy Orders." It is for this reason that Eucharistic intercommunion with these communities is not possible for the Catholic Church. However these ecclesial communities, "when they commemorate the Lord's death and resurrection in the Holy Supper ... profess that it signifies life in communion with Christ and await his coming in glory." (Catechism of the Catholic Church, number 1400) Members of the Orthodox churches and the Polish National Catholic Churches ...  more