Hartmut Geerken (1939-2021) was a German author, composer, musician, film-maker, performer, actor, mycologist, archivist, stager of exhibitions, publisher of numerous authors from the circle of literary expressionism and dada, lumberjack, and bumble-bee-keeper. As a percussionist, he has collaborated with a variety of free jazz musicians such as
Sun Ra, John Tchicai, Sainkho Namtchylak. As a poet, he was a practitioner of concrete poetry and organizes events such as the annual Bielefeld New Poetry Colloquium. As an actor, he appeared in six films by Herbert Achternbusch and appeared in two of Achternbusch's plays at the Munich Kammerspiele.
