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In page Agnes of Rome:

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Agnes was buried beside the Via Nomentana in Rome.[3] A few days after her death, her foster-sister, Emerentiana, was found praying by the tomb. Emerentiana claimed to be the daughter of Agnes' wet nurse. She was stoned to death after refusing to leave the place and reprimanding the people for killing her foster-sister. Emerentiana was also later canonized. The daughter of Constantine I, Constantina, was said to have been cured of leprosy after praying at Agnes' tomb. She and Emerentiana appear in the scenes from the life of Agnes on the 14th-century Royal Gold Cup in the British Museum in London.[citation needed]