The period of 1320-1388 AD saw most of the northern and central India being ruled by the three kings of Tughluq dynasty who established the strongest and most creative state in the history of Delhi Sultanate. But the Mughal monuments had such a dazzling effect on the historians that they did not properly notice almost equally important architectural marvels of the Tughluq period build by Ghiyathu'd-din Tughluq. Muhammad-bin Tughluq and Firuz Shah Tughluq. Their architecture spelt a true Indianization with the greatest amount of experimentation innovation and construction during 78 years span of the dynasty. It cannot, therefore be studied independently as an expression of an isolated movement of artistic activities. It has grown and developed in the soil of this country and has not been planted all of a sudden. It should be studied as a link in the continuous growth of the art in India. This volume includes in-depth analysis of the architecture of Delhi under the Tughluqs. The various chapters under which the subject has been divided are I. Tughluqs, II. Religious architecture, III. Secular architecture, IV. City complexes, V. Restoration architecture, VI. Architects, materials and techniques and conclusion. Besides text a number of photographs, plans and elevation of the monuments besides maps have been added to make the work as illustrative as possible