Trombones on Triumphal Arch

I just added the picture and entry below to the Trombone History Timeline (18th century).

c. 1800—France: Porte Dauphine, A print by Percier Charles (1764-1838) from Album Fontainebleau, includes at least two trombones (see below image; public domain) (source: Réunion des musées nationaux).