In the abbey of Montevergine (Avellino), in the middle of the chapel at the northern end of the transept formerly patronized by the Di Capua family, on a typically baroque mixed marble altar inside an older medieval ciborium, stands a little-known marble altarpiece with a eucharistic tabernacle, whose stylistic characteristics can be referred to the first half of the 16th century. We know from sources that the ancona's original position was on the high altar of the sanctuary in a space that enhanced its unusual opisthographic structure, and that its present location came after the collapse of the church's vault on 2 August 1629 caused by renovation work promoted by abbot Piero Danuscio. Assimilating the ideas of previous contributions, the article begins by discussing the question of the commissioning of the altarpiece, which was evidently associated with the Di Capua family, as the epigraph on the architrave and the coats-of-arms at the base of the front indicate, and ends with the formulation of a hypothesis as to its authorship. In particular, Luigi III of Capua (eighth count of Altavilla), recalled in the inscription, is acknowledged to have had the important role as first link in the family chain which, from the last decades of the Quattrocento, subsequently led to the realization of the original high altar. His descendant Luigi Martino (tenth count of Altavilla), in approximately the second quarter of the 16th century, would then have completed the undertaking with the inclusion of the eucharistic ancona. In conclusion, this chronological reconstruction allows us with greater conviction to include the stylistic characteristics of the artifact within the consolidated activity of Giovanni Marigliano da Nola (involved by the Altavilla family on other occasions) and his workshop, in this instance his greatest followers Annibale Caccavello and Giovan Domenico D'Auria.