(b) Sultan Firuz Shah Tughlaq was a Turkic Muslim ruler of the Tughlaq Dynasty. ‘Dar-ul-Shafa’ established by Feroz Tughlaq was a free hospital. Another important workd one by Feroz Tughlaq was repairment of Qutub Minar (1368)which has got damaged in earthquake. He also constructed double system of canals from Sutlejto Yamuna.