Dame Laurentia McLachlan | |
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| Born | Margaret McLachlan 11 January 1866 |
| Died | 23 August 1953 |
| Occupation | Benedictine nun |
| Known for | Abbess of Stanbrook Abbey |
Dame Laurentia McLachlan, OSB, née Margaret McLachlan, (11 January 1866 – 23 August 1953) was a Scottish Benedictine nun, Abbess of Stanbrook Abbey, and an authority on church music. She became posthumously known to a wide public when portrayed on the stage in a 1988 play, The Best of Friends.