The city of Aubervilliers has posted images of hundreds of posters created by members of the French design collective Grapus before, during, and after their official establishment from 1970 to 1990. Grapus emerged from the Atelier Populaire in May 1968.
It’s not the easiest site to navigate — once you click on a category, the tiny page numbers appear to the right, just under the thumbnails.
Grapus was active in Aubervilliers in the 1980’s and deposited their work with the city archives — who eventually posted them online just last month. The archive is the most complete collection of their ouput, consisting of 863 posters spanning 20 years of collective work on social, cultural and political issues. (Thanks, Gilles!)