Today I added the below image and caption to the Trombone History Timeline, 17th Century (1626-1650). I also plotted it in the Iconography Map, where there is now a nice little cluster of 4 historical trombone images in Prague.

c. 1630—Prague, Czech Republic: A decorative border in “Antiphonarii Praemonstratensis Sionei pars aestivalis” includes what appears to be a trombone (see below image; public domain). Special thanks to Bruce Dickey.