In pictures: Picasso and Africa

Woman with Joined Hands, is a sketch made for Picasso's Les Demoiselles d'Avignon, which he was working on at the time when he first saw African sculpture, at the Museum of Mankind in Paris in 1907. The African works come from collections in South Africa but are similar to works seen by Picasso. The names of their creators are unknown. "This gives us a way of validating an anonymous artist – we pay tribute through this exhibition to those artists," Marilyn Martin says.