This accomplished and lively Baroque drawing is a strong example of the dramatic yet elegant style characteristic of mid-seventeenth-century Genoese art. It is attributed to Valerio Castello, a Genoese artist whose short career is little documented. The sketch was formerly attributed to Jacopo Bertoia, but the bold technique, with figures set off by parallel hatching, is similar to that in several other drawings that have been firmly attributed to Castello. Here, Castello depicted a vision that Saint Francis had as he prayed in his chapel at Portiuncula, in Santa Maria degli Angeli, Italy, in which Christ appeared and granted a plenary indulgence (forgiveness for a sin) to future visitors to the chapel. The angel presenting flowers to Saint Francis at the lower left is a reference to an earlier moment of the saint’s legend, when Francis, experiencing temptation, threw himself into a bramble bush, and roses sprang from the place where his blood hit the bush.