I just came across this great painting by Spanish artist Jose Garcia y Ramos, who spent his career in Italy, France, and Spain, featuring a couple of brass players headed out into the rain after a concert. You can see it in historical context in the Trombone History Timeline (19th century, 2nd half). You can find reproductions of the painting here.

1877—Spanish artist Jose Garcia y Ramos features a trombonist in his painting, After the Concert (see below image; public domain).