Transforming existing architecture and assigning to it a new use for which it was not originally conceived entails an exhaustive process of historical, technical and functional exploration.

The crucial component of such interventions, often on disused buildings, is sustainability and can be summed up in this clear and concise maxim: ""the greenest building is the one that is already built"".

Through projects of various scales, often surprising but always sensitive to the historical context in which they are situated, this book illustrates the fascinating process of reconversion of built architecture.