| Doctor Mellifluus Encyclical of Pope Pius XII | |
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| Signature date | 24 May 1953 |
| Number | 24 of the pontificate |
Doctor Mellifluus is an encyclical of Pope Pius XII on the Doctor of the Church Bernard of Clairvaux, given at Rome, St. Peter's, on 24 May, on the feast of Pentecost, 1953, in the 15th year of his pontificate. In issuing it in anticipation of the eighth centenary of Bernard's death, Pius took the occasion to highlight Bernard's contributions to practical spirituality.