Mostly into the art here, but it's always nice to have a little background info for context. La Plume was a magazine out of Paris from 1889-1914. It showcased many famous artists like Mucha and Toulouse-Lautrec, and also featured poetry and other literary content.

Referenced in the poster above is Salon des Cent. That was an art exhibition from 100 artists, and lots of overlap with La Plume. Some art below.