The book project ´Vivarium´ will publish a detailed study of the research program of the Biologische Versuchsanstalt in Vienna (1902-1945). The objective is to locate the Vivarium inside the context of experimental and theoretical biology from 1900 to 1940, to map its networking grid that connected it to other Austrian and international research institutes, and to trace its diverse tie-ins to fin de siécle Vienna. The first part of the edited volume will introduce the Vivarium as a new research institution in Austria, delineate the Jewish topography of the families of Przibram, Portheim, and Figdor (among some others), positioning them inside the Viennese culture and bourgeoisie, and trace how the scientific community of the university and the academy acted towards them. The following main part, elaborating Vivarium´s research program of experimental and theoretical biology, will display the experimental work of the departments dealing with developmental physiology, classical genetics/heredity, botany and plant physiology, and medical physiology/endocrinology, without neglecting the role of the women scientists and including also a chapter on the impact theoretical biology had on the experimental research at the Vivarium. The third part presents the architecture of the building and its equipment, followed by a chapter discussing the collections, the library and the museum. The final part will discuss the international exchange programs, will compare the Vivarium with international research institutes (e.g., Cambridge, Agram, Lunz, Monaco, Moscow, Philadelphia, Rom), and university institutes working on similar problems.