Existing from 2600 B.C.E. to 1900 B.C.E., Mohenjo Daro was one of the largest cities of the ancient Indus Valley civilization. It was an agricultural city with a granary, large well and a marketplace. It was well-planned with well-laid out roads and buildings made of bricks of baked mud and burned wood. Some buildings were two-stories high, and the entire city is said to have housed 5000 citizens.
There was a public bath house with a furnace to provide heated water. The Great Bath might have also been a pool used for religious purification. Individual homes or groups of homes used water from wells. Some homes had rooms that were designated for bathing and waste water was sent to covered drains in the streets. The city was fortified and had two parts to it, the Citadel and the Lower City. Other large buildings of significance include the Pillared Hall and the College Hall. The College Hall had 78 rooms and may have been the residence of a priest. It is not clear if Mohenjo Daro was an administrative city like Harappa since both of them have similar architecture. The city of Mohenjo Daro was destroyed and rebuilt seven times, and each time the new city was built over the old one. The flooding of the Indus River is thought to have destroyed the city.