Difference between    citadel and lower town ?

Dear student​
Citadel- It is a stucture found in Indus valley cities.

•  It is a place higher than lower town.
• It is build on a high platform.
• People of the upper society were believed to live there.
• Inside it there was a structure called the Great Bath.

The Lower Town-It is a place for common people 

•  This was lower than the Citadel.
• There was a proper drainage system in the lower town.
• The lower town was in a grid shaped pattern.
• The streets were made by bricks.
• There was a structure called the Great Granary in the lower town.

Hope it helps