Book excerpt: This book contains papers presented at the second International Conference on Eco-Architecture . The original Conference was the first to be held worldwide on the subject of sustainable architecture in order to define what ECO-ARCHITECTURE actually is, i.e. "Harmonisation between Architecture and Nature." The subject has matured in the two years between conferences and the submitted papers can be categorised into Ecological and Cultural Sensitivity, Design with Nature, Resource Conservation and Building Technology, Design by Passive Systems, Case Studies, Rehabilitation and Adaptive Re-use. The affiliations of the authors whether in academia, the professions or industry indicate the very wide international scope and the interdisciplinary nature of the subject.