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In the exhibition Jack’s Jacks at Museum Hamburger Bahnhof Berlin. His fight for human rights of black people led him from a very colourful style (still to be seen in Berlin in his homage to Martin Luther King’s dream from the year 1968) to a darker but interesting mosaic style (also present in his famous colourful work for Obama (2011)

, which he showed twice in triptiques, the first smaller and somewhat lighter one in 1985, the second one in 2016 as a gift for the pop and rock musician Prince. All his works are done in acrylic