On the north side, the church of Santa Maria del Popolo is important for Raphael's Chigi Chapel, exquisite frescoes by Pincuricchio, and, above all, two profoundly disturbing early 17th-century paintings by Caravaggio, the Conversion of St. Paul and Crucifixion of St. Peter, in the Cerasi Chapel left of the choir.
The frescoes by Pincuricchio were constructed before the Chigi Chapel.