On views of the sacramental elements of the Eucharist:
Roman Catholics (transubstantiation): the transformation of the elements into the miraculous presence of the body of Christ and also creating the presence of Christ's sacrifice making forgiveness possible.
Greek Orthodox (divine Liturgy): the mysterious presence of the body of Christ.
Lutherans (sacramental union): the union of the elements with real already existing body of Christ. It is not consubstantiation which presents the body in a physical space.
Calvin (my position): the spiritual effect of the believe in the presence of the truth of the things signified. It is not Bullinger's receptionism which makes the miracle only true for the faithful.
Zwingli (memorialism - popular position): A reminder and remembrance in a symbolic sense.