- Rathmore began in 1953 as a convent school housed in an 1870s mansion, Rathmore House, which is still used for lessons today.
- It shares its motto, Ut vitam habeant (“That they may have life”) with its founders, the Sisters of the Religious of the Sacred Heart of Mary.
- Sports facilities include a state-of-the-art fitness suite, a full-size Gaelic football pitch, six tennis courts and a polymeric running track.
- Old Rathmorians include the Northern Ireland football international Damien Johnson and the actress Laura Donnelly.
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