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.
History of Asia
The Achaemenid dynasty of the Persian Empire, founded by Cyrus the Great, ruled an area from Greece and Turkey to the Indus River and Central Asia during the 6th to 4th centuries BCE. Persian politics included a tolerance for other cultures, a highly centralized government, and significant infrastructure developments. Later, in Darius the Great's rule, the territories were integrated, a bureaucracy was developed, nobility were assigned military positions, tax collection was carefully organized, and spies were used to ensure the loyalty of regional officials. The primary religion of Persia at this time was Zoroastrianism, developed by the philosopher Zoroaster. It introduced an early form of monotheism to the area. The religion banned animal sacrifice and the use of intoxicants in rituals; and introduced the concept of spiritual salvation through personal moral action, an end time, and both general and Particular judgment with a heaven or hell. These concepts would heavily influence later emperors and the masses. More importantly, Zoroastrianism would be an important precursor for the Abrahamic religions such as Christianity, Islam, or Judaism. The Persian Empire was successful in establishing peace and stability throughout the Middle East and were a major influence in art, politics (affecting Hellenistic leaders), and religion.