Sultan Firoz Shah Tughlaq (1351-1388) was well- known for his extensive public works and welfare measures. He established a specific department, the Diwan-i-Imarat, dedicated to overseeing building programmes, which included the construction of new cities (like Hissar, Fatehabad, Jaunpur, Firozabad), mosques, canals, hospitals (Dar-ul-Shafa), and schools.