History of the Roman Canon

The Roman Canon is the oldest eucharistic prayer used in the Mass of the Roman Rite, and dates its arrangement to at least the 7th century; its core, however, is much older. Through the centuries, the Roman Canon has undergone minor alterations and modifications, but retains the same essential form it took in the seventh century under Pope Gregory I. Before 1970, it was the only eucharistic prayer used in the Roman Missal, but since then three other eucharistic prayers were newly composed for the Mass of Paul VI.

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