Cities are among the most enduring and remarkable of human artefacts. This study explains how and why cities took the shape they did. Professor Kostof focuses on a number of themes - organic patterns, the grid, the city as diagram, the grand manner and the skyline - and interprets the hidden order of urban patterns. Photographs, historical views and specially commissioned drawings depict a global mosaic of the shaping of medieval Siena; the creation of New Delhi as the crown of the Raj; the remodelling of Moscow as the self-styled capital of world socialism and the transformation of the skyline as religious and civic symbols yield to the towers of corporate business.