A report on the colloquium Biology and Building, 7 and 8 May 1971, presented by the Institute for Biology and Anthropology of the TU Berlin, Director J.=G. Helmcke, and the Institute for Lightweight Structures of the University of Stuttgart, Director Frei Otto, Organization of the colloquium: Jorg Wagner. The topic of this colloquium is related to Collaborative Research Center 64 (Sonderforschungsbereich 64).