Why not?
No, it is not in communion with the Catholic Church.
I have never heard of a Marians Church. Do you mean Maronite? The Maronite Rite is in full union with Rome and a Catholic Church. Yes, you may receive communion.
They are not honoring the Roman Catholic Church- but the Universal Church. Catholic means Universal. To be praising the Catholic Church, is praising the unity of all believers in the Triumphant Church to come.
No, that is a mortal sin. That adult should not be receiving Communion or that would be sacrilege, another mortal sin.
A Roman Catholic will never receive communion in other churches.
Technically no; the Polish National Catholic Church is not part of the Roman Communion. But priests don't typically interrogate each communicant before giving them the host..Catholic AnswerFirst of all, there is no "Roman" Catholic Church. It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church. The Polish National Church is a Church which broke away from the Catholic Church after Vatican Council I. However, the Polish National Catholics believe in the Real Presence of Our Blessed Lord in the Eucharist, have a valid priesthood, and valid sacraments. Under current canon law, a Polish National Catholic, in danger of death, who is unable to receive the sacraments from a priest of his Communion, may request the sacraments from a Catholic priest, and with the local bishop's permission, may receive Confession, Holy Communion, and Anointing from a Catholic priest. Please note that this is 1) in danger of death, 2) when a priest from his own Communion is unavailable, 3) and he freely requests it on his own. However, to just go up to receive Holy Communion in a Catholic Church when not in communion with the Catholic Church AND/OR not in a state of grace is perilous to one's spiritual health, and is not something to engage in.
The pre-1560 church was Roman Catholic. The Scottish Reformation ultimately led to a Presbyterian system of Church governance.
I take it that you mean if a member of the Church of Ireland receive Communion in the Catholic Church. Well the Church of Ireland is an branch of the Anglican Church and thereby not in union with the Bishop of Rome, so no, a member of the Church of Ireland cannot receive Communion in the Catholic Church. To receive Communion in the Catholic Church, you are to be Catholic united to Rome and accept the doctrine of transubstantiation in the Eucharist. Now if you are a member of the Catholic Church in the country of Ireland, yes you are allowed to because you are Catholic in that sense, but again, an Anglican member of the Church of Ireland cannot receive Communion unless they convert to Catholicism and accept all teachings taught by the Magisterium concerning the Eucharist..Catholic Answer.It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church. Short answer: No, the Church of Ireland is a protestant Church, and is most definitely not in "Communion" with the Catholic Church. The only way that an Anglican (member of the Church of Ireland) may receive Holy Communion in a Catholic Church is to convert. Pope Benedict issued a Motu Proprio several years ago, which allows Anglicans to convert to the Catholic Church and retain their own usages in the Latin Rite, it is call the Anglican usage, see link below.
The Catholic Church is in communion primarily with the Eastern Catholic Churches, which are fully united with the Pope and the Roman Catholic Church while maintaining their own distinct liturgical practices and traditions. Additionally, the Catholic Church seeks ecumenical dialogue with other Christian denominations, such as the Orthodox Churches, Anglican Communion, and various Protestant groups, although these churches are not in full communion with the Catholic Church. The aim of such dialogues is to promote unity among all Christians while respecting theological differences.
They are a place of worship and in the Roman Catholic Church, it is normally the place for doing the Sacrifice (Holy Communion).
The Protestant Church, however there are many sects of the Protestant church such as: Presbyterian, Baptist, and Methodist.
Roman Catholic AnswerI think you have this backwards, the Church, in Christ, is like a sacrament - The Church IS a sign and an instrument of communion with God and of unity among men - from the Catechism of the Catholic Church, paragraph 775.