The aim of this work has been to sketch the various periods and styles of architecture with the broadest possible strokes, and to mention, with such brief characterization as seemed permissible or necessary, the most important works of each period or style. Extreme condensation in presenting the leading facts of architectural history has been necessary, and much that would rightly claim place in a larger work has been omitted here. The danger was felt to be rather in the direction of too much detail than of too little. While the book is intended primarily to meet the special requirements.