Added another image to the 17th Century (first half) timeline. St. Cecilia is, of course, the patron saint of musicians; it is said that she sang to God as she was dying. This particular painting seems to have a pretty clear depiction of at least one trombone, while hinting at two others nearby. Here’s the image and timeline entry:
c. 1630—Italian artist Ortensio Crespi’s St. Cecilia includes one fairly clear depiction of a trombone at the foot of the painting, as well as what appear to be two additional partially-obscured trombones on the other side of the viol (see facing image; public domain).