In the Earliest Cities — Social Studies STD 6 — Question

Many of these cities were divided into two or more parts. Number one was the west part which was smaller but higher. Archaeologists described this as the ‘citadel’. Number two was the east part which was larger but lower. Around each part, baked bricks were used. Bricks were so well-made that they have lasted for thousands of years. The bricks were laid in an interlocking pattern that made the walls strong.