Karla Sachse studied art pedagogics at Humboldt-Universität Berlin, where she later received her PhD. Since 1982 she has been engaging intensely in Mail Art, street actions, visual poetry, installations in space and language areas. Besides working as a teacher she shows, organizes and curates exhibitions, is holding workshops, and is invited to and participates in a wide range of international exhibitions. For Berlin she created several Think-Signs in public spaces.