Persepolis
Darius I built the greatest palace at Persepolis on the western side of platform. This palace was called the "Apadana". The King of Kings used it for official audiences. The work began in 518 BC, and his son, Xerxes I, completed it 30 years later. The palace had a grand hall in the shape of a square, each side long with seventy-two columns, thirteen of which still stand on the enormous platform. Each column is high with a square Taurus (bull) and plinth. The columns carried the weight of the vast and heavy ceiling. The tops of the columns were made from animal sculptures such as two-headed lions, eagles, human beings and cows (cows were symbols of fertility and abundance in ancient Iran). The columns were joined to each other with the help of oak and cedar beams, which were brought from Lebanon. The walls were covered with a layer of mud and stucco to a depth of 5 cm, which was used for bonding, and then covered with the greenish stucco which is found throughout the palaces.
Abdallah ibn Amir
He accordingly marched with a large force to Persepolis; the city surrendered and agreed to pay tribute. From here the army marched to Al j bard, where a small resistance of Muslims had captured the city, and citizens agreed to pay tribute. Thereafter the Muslim force advanced to Jor. The Persians gave battle but they were defeated and the city was captured by the Muslims. Peace was made on the usual term of the payment of Jizya. While the Muslim army was still in Jor, Persepolis again broke into revolt; Abdullah ibn Aamir took the forces to Persepolis and laid siege of the city. After a violent battle the Muslims were able to regain the control of the city once again. All leaders among the Persians who were guilty of instigating the revolt were hunted out and executed. With the fall of Persepolis, other cities in Fars also submitted unconditionally. The Uthman’s appointed governor of Fars, after analyzing the situation, sent Islamic missionaries to various cities of the region to convert the people to Islam to avoid a revolt in future, as the cause of revolt was the spirit of nationalism in Persians and discrimination of Persians by Arab rulers.