Today I added the below caption and image to the Trombone History Timeline (18th century) and to the collection, Backward Advances: Rear-Facing Trombones throughout History.
Late 18th-early 19th century—Paris, France: “Un tromboniste,” a portrait by Henri-François Riesener, features a musician with a rear-facing trombone (see below image; public domain; Detroit Institute of Arts). Special thanks to Tassos Dimitriadis.