The establishment, dating back to the first half of the third millennium B.C., was discovered in the third phase of the excavations.

So far only 400 meters of the building have been unearthed with walls with a width of 120 to 140 centimeters and a height of 4 meters.

The establishment which comprises a grand central hall and several corridors, is estimated to have occupied an area of 1,000 square meters. It is the largest monument unearthed in the Burnt City so far.

In the course of the recent excavations, the archeology team for the first time discovered a giant staircase with a set of 8 stairs each 3.20 meter long, 40 centimeter wide and 20 centimeter high.

Head of the team Mansour Sajjadi said that the resemblance between the staircase and those in the Persepolis suggests that the recently discovered staircase has served as a pattern in the building of the world famous historical monument in Persepolis.

A large number of metal pieces, seals, clay works, rope and clay statutes of human beings and animals are among other objects unearthed in the course of the third phase of excavations.

The discovery of the statute of cow is an indication to the fact that people of that time were worshiping the animal.

The Burnt City, the largest ancient ground so far unearthed at the Iranian plateau, had a population of over 5,000.