Belleroche was an integral part of the Parisian art scene during the Belle Époque - he was a close friend of the artist John Singer Sargent with whom he shared studios in Paris and London; he was admired and collected by luminaires such as Degas and Renoir - anbdchampioned by the art critic Roger Marx. With Toulouse-Lautrec he shared the celebrated model Lily Grenier. And it is even said that Oscar Wilde's Picture of Dorian Gray was inspired by Belleroche.

Belleroche was considered by his contemporaries to be an innovator. In the art of lithography he developed techniques that built on the experiments of Degas and other Impressionist, (with whom he shared a fascination for monotypes). Despite all these fascinating facets of his life and art, his story remains largely unknown.