by Morwenna Brett The Chapel ceiling at Westminster Cathedral, London - photo John Salmon Charles Tournemire’s (1870–1939) L’Orgue Mystique is a cycle of solo organ pieces composed for use in the Roman Catholic liturgy.  Tournemire wanted to do for the Roman Catholic Mass what Bach had done for the Lutheran Mass with his Orgelbüchlein. The completed work is subtitled 51 Offices de L'année liturgique inspirés du chant grégorien et librement paraphrasés (51 Offices of the liturgical year inspired by Gregorian chant and freely paraphrased), and Westminster Cathedral have begun a performance of the complete cycle (around…