Baron Carl Johan Louis De Geer af Finspång (born 13 July 1938) is a Swedish artist, writer, musician and friherre (baron) of the De Geer noble family.

De Geer was born in Montreal, Quebec, Canada.

[1] He broke with his bourgeois background and became a leftist artist, and studied at Konstfack, University College of Art, Crafts and Design in Stockholm.

The poster was shown in an art gallery, but was immediately confiscated by the police.

[3] De Geer has written a number of books and was also a member of the Swedish radical prog band Blå Tåget.