It has been found a previous painting under the painting of Picasso “Retrat de la Mare de l’Artista”. When Picasso was young, Picasso’s family was a modest family and they didn’t have enough money to buy a lot of canvas. So he painted on every surface he found: a fan, a tambourine… I guess he reused an old painting to paint over this the portrait of his mother.
Now it’s possible to discover the places that Picasso frequented in Barcelona: Tour Picasso