Rammed earth Tierrafino. In 1983, we were asked to build a school building for the horticulture class at the Waldorf School in Hanover. With the help of teachers, parents, children and friends, we successfully completed this magnificent project. With thanks to Klaus Eckert, Bruno Hoffmann, Uwe Claus, Uli Utzenrath, Peter Lampasiak, Marion Wagner and the many other lovely people with whom we realised this fantastic rammed earth project.