For protection: Ghiyasuddin Tughlaq built it to protect his empire from the Mongol invasion.
Military strategy: The fort was surrounded by strong fortifications, high walls and deep moats, making it considered an invincible fort.
New capital: Ghiyasuddin Tughlaq wanted to make it his capital, but it was later deserted.
Features
Massive walls (10-15 meters high)
Three main gates
Strong structure made of stones
Remains of settlement and palace
Tomb of Ghiyasuddin Tughlaq