Possibly the most singular aspect of the architecture of Jrn Utzon is his particular concern for the expressivity of structure and construction. Grounded in the tectonic line of the modern movement, his work can be seen as part of a continuous development extending from Auguste Perret to Carlo Scarpa. Kenneth Frampton examines Utzon in the light of the notion that modern architecture is as much about construction as space and abstract form. Frampton contemplates Utzon's relationship to topics such as Japanese architecture, platforms and plateaus, roofwork and earthwork, boat building and church building, before discussing the Sydney Opera House. Kenneth Frampton is Ware Professor in Architecture at Columbia University. NB: Cuts out during lecture.