What is the significance of the citadel in the cities of the Indus Valley Civilization?

       Of the many parts of a Harappan city,  the citadel at the centre had a vital role to play. The citadel was the main part of the city, built on a raised platform. It was built of bricks and surrounded by a huge brick wall. The citadel consisted of public buildings, a bath, and granaries and quarters for providing shelter to the persons who taught religion. The remaining parts of the city were spread around the citadel. People went to the citadel for protection when the city was under attack.

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