I just added the below image and caption to the post, Serpent & Ophicleide: History and Images, bringing the total number of images on that post to 81. The angel’s playing position is interesting—makes the instrument almost look like a bari sax!

1704-14—Saalfeld, Germany: Carlo Ludovico Castelli paints an angel playing a serpent in Saalfeld’s Schlosskapelle (see below image; public domain).