Institutio generalis Missalis Romani

The sanctuary is the place where the altar stands, where the word of God is proclaimed, and where the priest, the deacon, and the other ministers exercise their offices. It should suitably be marked off from the body of the church either by its being somewhat elevated or by a particular structure and ornamentation. It should, however, be large enough to allow the Eucharist to be celebrated properly and easily seen.^{115Cf. Sacred Congregation of Rites, Instruction Inter Oecumenici, On the orderly carrying out of the Constitution on the Sacred Liturgy, 26 September 1964, no. 91: AAS 56 (1964), p. 898.}