The size of the city and the availability of buildings suggest a high level of social organization. The city was divided into two parts - the Upper Town, the so-called Citadel, and the Lower Town. The Citadel - a mud-brick mound approximately 12 meters high - had public baths, a large residential structure designed for approximately 5,000 inhabitants, and two large assembly halls. The town had a central square with a large central well. The city was equipped with a sewage disposal system that was transferred to covered canals running along the main streets. Some houses contained special rooms that could be considered bathing rooms, and one building had an underground stove, known as a hypocaust, a central heating system that circulated hot air under the floor or in the walls, or to heat the bath water. Most of the houses had internal courtyards and doors that opened onto side streets. Some buildings had two floors.
