In the edition of the Roman Missal used in Australia it has in the General Instruction:
“299. The altar should be built separate from the wall, in such a way that it is possible to walk around it easily and that Mass can be celebrated at it facing the people, which is desirable whenever possible. Moreover, the altar should occupy a place where it is truly the centre toward which the attention of the whole congregation of the faithful naturally turns. 116 The altar should usually be fixed and dedicated.”
Footnote 116 has: Cf. Sacred Congregation of Rites, Instruction,
Inter Oecumenici , 26 September 1964, no. 91:
Acta Apostolicae Sedis 56 (1964), p. 898.
“Chapter V. Designing Churches and Altars to Facilitate Active Participation of the Faithful
I. DESIGN OF CHURCHES
- In building new churches or restoring and adapting old ones every care is to be taken that they are suited to celebrating liturgical services authentically and that they ensure active participation by the faithful (see SC art. 124).
II. MAIN ALTAR
- The main altar should preferably be freestanding, to permit walking around it and celebration facing the people. Its location in the place of worship should be truly central so that the attention of the whole congregation naturally focuses there.
Choice of materials for the construction and adornment of the altar is to respect the prescriptions of law.
The sanctuary area is to be spacious enough to accommodate the sacred rites.
III. CHAIR FOR CELEBRANT AND MINISTERS”
Following its publication in 1964 questions were asked and responses published in Notitiae in 1965, including:
“Query: For celebration of Mass facing the people is it lawful to construct a portable altar in a permanent manner in front of the main altar? Reply: Per se it is lawful, but it is not recommended. For the faithful take part very well in a Mass celebrated according to the norm of the new
Ordo Missae even if the altar is made in such a way that the celebrant turns his back to them. The entire liturgy of the word is celebrated facing the people, at the chair, or at the lectern. If, in spite of this, the pastor of the church has decided to place another, portable altar in front of the main altar, this altar is to be set up as temporary. There is to be a truly observable space between both altars and the portable altar is to have enough space around it to serve as a kind of sanctuary: Not 1 (1965) 251, no. 62.”
(This is from the book Documents on the Liturgy 1963-1979, (c) 1982, ISBN 0814612814 page 108).
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