[1] At one point, Agrippinus seems to have been as popular as the more celebrated Saint Januarius (San Gennaro).
[2] The foundation of the church of San Gennaro extra Moenia in Naples is connected with the Catacombs of San Gennaro, the largest Christian catacomb complex in southern Italy.
The first structure was probably the result of the fusion of two ancient burial sites, one from the 2nd century CE that contained the remains of Saint Agrippinus, and the site from the 4th century that contained the remains of Januarius.
In 1744, Cardinal Giuseppe Spinelli, archbishop of Naples, conducted a search for Agrippinus' relics.
He found a marble vase with the following words written: "Indeterminate relics that are believed to be the body of Saint Agrippinus.