Shadowsmay be insubstantial but they are, nevertheless, an important element in architecture. In prehistoric times we sought shade as a refuge from the hot sun and chilling rain. Through history architects have used shadows to draw, to mould form, to paint pictures, to orchestrate atmosphere, to indicate the passing of time ... as well as to identify place. Sometimes shadow can be the substance of architecture.
Simon Unwin is Emeritus Professor of Architecture at the University of Dundee in Scotland. Although retired, he continues to teach at the Welsh School of Architecture in Cardiff University, Wales, where he taught for many years. His books are used in schools of architecture around the world and have been translated into various languages.