 In 1517 a relic of St. Luke had been donated for the altar by the painter Barthel Pons, who had gotten it from the cardinal Christoforo da Forli (with the additional title S. Maria Aracoeli).This relic was accompanied by an indulgence of 100 days to whoever would say their Paternoster and Ava maria at the altar.Apparently Pieter Fransz de Grebber gave this relic to the Franciscan friar Joannes Cloribus van Brugge in 1627 for safekeeping.