He appointed at the Convento di Brescia and from there he moved to St. Mark's Square in Florence where he completed his formation as a disciple of Anthony of Padua.

His feast day is on 19 January and in the Roman Martyrology at that date it is remembered:"At Morbegno on the Alps in Lombardy, Blessed Andrea da Peschiera Grego, priest of the Order of Preachers, who for a long time walked all over the region, living soberly among the poor and fraternally conciliating the minds of all.

''<(Roman martyrology) After the Napoleonic Wars the relics of Andrea Grego were solemnly translated into the Chapel of St. Joseph to the Collegiate of St. John the Baptist of Morbegno.

In 1933 it was created to accommodate the remains of an urn in Baroque style and in the sixties the wax mask that still covers his face.

Another relic remained in the church of St. Martin, while in the sanctuary of the Madonna del Frassino, always in Peschiera, are the rock on which Andrea was sleeping when they quarreled with his brothers for his faith, and a sixteenth-century painting by Paolo Farinati that depicts the Blessed together with Mary, Saint Francis and Saint Sebastian.