Otl Aicher (1922–1991) and Inge Scholl founded the Volkshochschule Ulm after the end of World War II. The lectures there addressed topics from various fields of knowledge, focusing mainly on civic education and environmental design. Aicher based his posters for the school on a system of so-called graphemes that are either round or square in shape. Their color scheme and formal concept are derived from the steles developed for the school: several posters together create an eye-catching color grid.