photo - St. Peter Cathedral collection

he north transept is a good spot from which to view the choir loft windows, which feature the musical saints. At twelve 0' clock is St. Cecilia, patron saint of musicians since the sixteenth century. King David, at three o'clock, we're reminded, played the lyre as he watched his father's sheep.  The saint at six o'clock is St. Gregory. At nine o'clock is St. Ambrose, who composed hymns, taught people to sing them, and is credited with the Ambrosian chant.  The saints are surrounded by five adoring angels carrying a trumpet, cymbal, bells, a drum, and a triangle. At the bottom of the window, note the symbols of Christ.