Nereus and Achilleus
Nereus and Achilleus are two Roman martyr saints. In the present General Roman Calendar, revised in 1969, Nereus and Achilleus are celebrated on 12 May.
The Tridentine calendar had on 12 May a joint feast (semidouble rank) of Nereus, Achilleus and Pancras. The name of Domitilla was added in 1595. The joint celebration of Nereus, Achilleus, Domitilla and Pancras continued with that ranking (see General Roman Calendar of 1954) until the revision of 1960, when it was reclassified as a third-class feast (see General Roman Calendar of 1960).
In the Martyrology
- May 12 Saints Nereus and Achilleus, martyrs