Excavations during the 1997-2001 seasons were carried out inside perimeter wall . Here a partial plan of those excavations shows superimposed levels of Period 3C buildings, all mostly robbed of their baked brick walls.
Ancient Indus walls.
Top plan view of Harappan (Period 3) and Early Harappan (Period 2) walls on the west side of Trench 54.
Towards the east, in what was probably a low area, a series of radiating mud-brick retaining walls were built to contain rubble that was used as a foundation for later structures, only fragments of which are preserved.
Overview of Trench 57 excavations that were continued in 2001 to reveal massive baked brick wall voids and additional baked brick drains. Looking West.
Structures in this part of Harappa were sometimes made of a combination of mud-bricks and baked bricks, sometimes mixed in the same wall as seen here in the case of both the southern part of the western wall and part of the northernmost wall.