This is an explanation of the nature and role of architecture by reference to the work of several important contemporary theorists. It establishes the importance of such key issues in design as the Genius Loci, or spirit of place, the existence of what can best be termed forces which effect design and the essential characteristics of form, including such issues as geometry, structure, axes, surface treatment and rhythm. In the second part of the book a series of analysis demonstrate the methodology which includes an analyses of the city and works by significant masters of modern architecture including Alvar Aalto, Richard Meier, James Stirling and Robert Venturi.