How was the lower town different from the Citadel in the towns of the Indus valley civilization

The citadel was built on a raised plateform while the lower town was located on the lower part of the town. The lower town was larger than the citade. While public buildings like the Great Bath was built in the citadel, the lower town ususally had only residential buildings.

answer; philip morin freneau

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers