General Instruction of the Roman Missal

The General Instruction of the Roman Missal (GIRM)—in the Latin original, Institutio Generalis Missalis Romani (IGMR)—is the detailed document governing the celebration of Mass of the Roman Rite in what since 1969 is its normal form. Originally published in 1969 as a separate document, it is printed at the start of editions of the Roman Missal since 1970.


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