Comprises drawings and presentation portfolio relating to Otto Koenigsberger's Technische Hochschule Diploma Project, for a Zoological Garden, 1931. The drawings comprise 3 pencil and watercolour sketches, measuring 64 x 47.5cm, depicting the proposed architecture and environment for the Desert zone, Steppes zone and Cold and Polar zone; 1 pencil and watercolour sketch, mounted on board, measuring 45 x 33 cm, showing an exterior perspective of a portion of the main restaurant facilities; 12 sheets from a presentation portfolio measuring 70 x 33.5cm, incorporating prints and explanatory text. Presentation portfolio is dated 19th October, 1931. Also includes a set of four negative photographs of the project, including one of a no-longer extant drawing.