The aims of these posters are, on one hand to inform about an exhibition on posters called «this is is a public wall!» hold at the Barcelona Design Museum.
On the other hand, to explain to all the citizens that everybody can hang posters on the advertising columns placed on the streets given that in Barcelona no permissions are required.

By hanging these posters on the advertising columns we wanted to bring attention to everybody that these columns in our city are like public walls.

This poster is composed of different pieces of information imitating the superposition of poster on walls.