Gregoriusmis met H. Potentinus van Steinfeld, H. Andreas en de stichter abt Reinier Hundt

The Master of the Holy Kinship the Younger was a Cologne painter active around 1480–1520 who worked in the tradition established by the Master of the Holy Kinship the Elder, producing altarpieces for Cologne's numerous religious houses. The panel depicting the Mass of Saint Gregory — Christ appearing to Gregory with the instruments of the Passion — combined with Saints Potentinus, Andrew, and the donor abbot Reinier Hundt was a commission for a Cologne collegiate church or Benedictine house. The Mass of Saint Gregory was the most important image in the theology of Eucharistic devotion, guaranteeing the efficacy of Masses said for the donor's soul.

The master organises the composition with Gregory's visionary Mass at centre, the flanking saints providing the formal symmetry demanded by altarpiece convention. His Cologne figure type — soft-faced, with round eyes and small mouths — is deployed consistently, the vision's supernatural element distinguished from the donor portrait by a change in scale rather than style.